Yume 2kki:Wallpapers

Throughout Yume 2kki, Urotsuki can unlock wallpapers for her computer under specific conditions or when certain events are triggered. This page lists all the available wallpapers in Yume 2kki and the conditions required to unlock them.

The wallpaper selected on Urotsuki's "real" computer affects the background on her dream computer, and also influences which character appears in Ending ?.

There are currently 835 wallpapers available to unlock in the game as of the latest version. They might not appear even if you fulfill the requirements, or take multiple attempts to unlock. It should also be noted that sometimes you may have to do things again, as the game might not have been tracking it until the wallpaper was implemented.

Each wallpaper is listed below by number, along with the conditions necessary to unlock them.

There are also puzzles for Urotsuki's game console, which, like wallpapers, are unlocked by meeting conditions in the game.

Wallpapers

000-100

#0 - "your" - Can be enabled by choosing the second option in the Picture menu of Urotsuki's PC.
#1 - "Default" - The computer's default wallpaper.
#2 - "Uro Check" - After clicking on the Picture icon in the Tools section on Urotsuki's PC.
#3 - "Dream Sheep", by 山上下 - After sleeping 3 times.
#4 - "Blue Passage", by きな子もち - When you enter The Hand Hub for the first time.
#5 - "Buddha", by 20 - When you activate the Buddha Rave event in Marijuana Goddess World.
#6 - "Dot Urotsuki", by 黒天 - After collecting at least 4 effects.
#7 - "OG3 Dance", by yuanshang - When you interact with the painting of the same image in the Art Gallery.
#8 - "The Mysterious World", by ヤミキノ - When you interact with the painting of the same image in the Art Gallery.
#9 - "heart256", by ぁもゆ - After looking at the fourth book from Urotsuki's left on the second bookcase down and the second bookcase left in the Library.
#10 - "Remote Island Sisters", by 20 - After interacting with Desu-chan and Onee-chan
#11 - "2.", by 白くま - After getting 9 effects (including the Instructions).
#12 - "Crocodile Dog", by yuanshang - After going to the "Green Monster Party" in Garden World.
#13 - "Fairytale 11" - When you enter Theatre World for the first time.
#14 - "Alley", by こ（び） - When you enter Japan Town for the first time.
#15 - "Rainbow", by FOUNCID - After getting the Rainbow effect.
#16 - "Japanese Urotsuki", by 十人十ゐ - After sleeping 10 times.
#17 - "Master", by 白くま - When you enter the Underground Bar in Japan Town for the first time.
#18 - "Sky With A Rainbow", by まっくろ - When you use the Rainbow effect at the Snowy Pipe Organ.
#19 - "TV Rodeo", by yuanshang - When you enter the room with the purple wavy lines on the floor at the Underwater Amusement Park for the first time.
#20 - "Dancer", by 上埜月 - When triggering Odorika's full screen dance event.
#21 - "Effects Festival", by 黒天 - When you collect at least 10 effects.
#22 - "Provost", by yuanshang - When encountering the Commando and Provost-san when the submarine is not open.
#23 - "Childbirth", by 白くま - After encountering Mother in Urotsuki's Dream Apartments.
#24 - "Scars", by 十人十ゐろ - When you interact with the giant mannequin in Nail World.
#25 - "Signs", by oudn - When you enter Sign World for the first time.
#26 - "Space", by 20 - After chainsawing Tapir-San's back to get into Space.
#27 - "White Twintails", by 白くま - After getting the Twintails effect.
#28 - "Octopus Man", by 山上下 - After using the Fairy effect on Tako Otoko.
#29 - "Painter", by 山上下 - After entering the first painting you see in the Art Gallery after going through the easel.
#30 - "Giant Squid", by けるお - When you enter the Reef of Atlantis for the first time.
#31 - "Order", by 陸 - When you swim down the road leading to the Underwater Amusement Park.
#32 - "Aojiru", by みあ - After interacting with Aojiru.
#33 - "Boy 1", by 幸付き⇔Y-0 - After getting the Boy effect.
#34 - "Comic Urotsuki", by うつがめ - After getting at least 14 effects.
#35 - "Gakuran", by 黒肋 - After getting the School Boy effect.
#36 - "Spring", by みあ - After getting the Spring effect.
#37 - "TV", by コド - When you enter Urotsuki's Dream Apartments and turn on the TV.
#38 - "Heart", by ノア - After entering Valentine Land.
#39 - "Chocolate", by 白くま - When you enter Chocolate World for the first time.
#40 - "Park", by 山上下 - After chainsawing the sane Shadow Woman in Forest World, going underground and then emerging.
#41 - "Doppelganger", by 戀雅　鵺 - When using the Glasses effect on the nighttime ledge in Day and Night Towers.
#42 - "Headless Woman" - When you interact with the Music Box Woman found in Nail World.
#43 - "Director's Daughter", by 白くま - Multiple requirements (see below).
#44 - "Even Without Support", by エダマメ. - When you interact with the painting of the same image in the Art Gallery.
#45 - "Hourglass Desert", by ヤミキノ - When you enter the Hourglass Desert for the first time.
#46 - "Confinement", by 20 - After getting the event inside the Dungeon in the Underwater Amusement Park.
#47 - "Those Who Wait", by kinago - After encountering the Boy on the Bench in the Blue Forest.
#48 - "Twins", by 白くま - After interacting with the Beret Twins.
#49 - "inu 1" - When you enter Teddy Bear Land for the first time.
#50 - "Megusuri & Hako-ko", by Lupa - After interacting with Megusuri Uri in the Eyeball Shop.
#51 - "Itetsuki", by 白くま - After trying on the winter gear in the Dressing Room (You must have completed the Plated Snow Country minigame).
#52 - "Sweets", by みあ - After interacting with Sweets Musume while the Cake effect is equipped.
#53 - "Musician & Cat", by 月狗使-Tsukushi- - After meeting Elvis Masada.
#54 - "Cake-chan", by 白くま - After getting the Cake effect.
#55 - "Zerisan", by ぜり - After getting 20 effects (including the Instructions).
#56 - "Mini Game (↑V↑)", by 山上下 - After completing the ↑V↑ minigame.
#57 - "Incubation", by よじお - After coming across the creatures in tanks at the Power Plant.
#58 - "Silhouette", by 蒼色metamon - When you enter the Monochrome Street for the first time.
#59 - "Uboa", by 山上下 - When encountering Dogboa.
#60 - "UFO", by ころんば - After getting abducted from the Apartments.
#61 - "Fox", by 懺悔 - After interacting with Yukata in The Invisible Maze.
#62 - "Mars", by アルツ - After interacting with the Blue Crying Man during the Zalgo event.
#63 - "Twintails & Black Telephone", by 水利 - After getting the Twintails effect.
#64 - "Reading Theatre", by 水利 - When using the Telephone effect on Oni Musume while she is reading.
#65 - "Sweets Musume", by aki - After interacting with Sweets Musume while the Cake effect is equipped.
#66 - "Don't Watch", by 路地裏 - When you climb up the ladder to Tapir-San's Place.
#67 - "Present/Past", by kmn - After viewing the Lonely Urotsuki event in the Underwater Amusement Park and obtaining Stretch and Child effects.
#68 - "Dreams & Reality", by ナゴー - After sleeping 30 times.
#69 - "My Real Studies", by ウィル - After activating the cloning machine in Red Brick Maze.
#70 - "Killing Mirror in a Dream", by ウィル - After chainsawing your "reflection" in a room in Day and Night Towers.
#71 - "Monmons", by 壱峪ひろ - After interacting with the Monmons in Marijuana Goddess World at least 6 times in one visit.
#72 - "I thought you were a Friend", by ウィル - After getting attacked by the insane Shadow Woman in the Floating Red Tiles World.
#73 - "Twintails Maid", by みあ - After combining the Twintails effect with the maid outfit in the Dressing Room.
#74 - "Turn of the Month", by 蒼椈森Haya - When you use the Glasses effect during the Lonely Urotsuki event*.
#75 - "Glasses Suit", by 水利 - After combining the Glasses effect with the suit in the Dressing Room.
#76 - "Do Not Disturb", by ウィル - After getting the Wolf effect.
#77 - "Sun & Woman", by 若 - After being next to the lady under the big red sun in the Forlorn Beach House.
#78 - "Mushroom", by ヤミキノ - After you enter Mushroom World for the first time.
#79 - "Hanging Child", by 水利 - When coming across Koshukei-tan in the Graffiti Maze.
#80 - "Detour Around My Face", by mero - After walking near your ghost in the Reef of Atlantis.
#81 - "Monster", by aruva - After eating the cake that turns you giant in Toy World and crushing a certain amount of buildings in Mini-Town.
#82 - "Watering", by 山上下 - After interacting with the Farmer in Farm World.
#83 - "Howling At The Moon", by 彼岸花 - When using the Wolf effect to howl at the moon on the nighttime ledge in Day and Night Towers.
#84 - "Not & Marginal", by あまた　ゆきえ - After reading the fifth book on the first bookcase to the left in Library or after obtaining the Marginal effect.
#85 - "Do You Also", by ろーずまゆたん - After interacting with Oni Musume while she's reading.
#86 - "★Penguin★", by 水利 - After getting the Penguin effect.
#87 - "My World", by ウィル - When you enter The Nexus for the first time.
#88 - "Director", by yuanshang - After interacting with Yume in Tapir-San's Place.
#89 - "bonsoir, mon reve", by 神埼由羅 - After visiting all the landmarks on this Wallpaper (Check Below).
#90 - "Dreams・Dreams・Dreams", by 白くま - After getting the Child effect.
#91 - "B-Kun Excretion Festival", by 幸付き - After using the Boy effect in the Bathroom in the Dark Room.
#92 - "Box Child", by もけ子 - When finding Hakoko in the box in the Eyeball Shop.
#93 - "Dokokano Night B", by にゃー - After laying in Urotsuki's bed in the dreamworld.
#94 - "TP Child Alone", by 流れ。 - When you use the Child effect before viewing the Lonely Urotsuki event at the Underwater Amusement Park.
#95 - "Why? BOKN Cliff", by あしなべ - When you chainsaw the girl at the Outlook in The Invisible Maze.
#96 - "They're Scraped", by もけ子 - After reading the fifth book on the first bookcase to the left in Library or after obtaining the Marginal effect.
#97 - "20", by ころんば - Multiple interactions (see below).
#98 - "Me Without Color", by 若 - After obtaining at least 20 effects.
#99 - "Maiko", by 20 - After getting the Maiko effect.
#100 - "Full Smile!!", by もりしゃん - After visiting Smile-san and making him laugh.

101-200

#101 - "Crying/Laughing", by 山上下 - After chainsawing the large crying white creature in Blood World.
#102 - "Hat", by らう - After meeting the lady underneath the big red sun in the Forlorn Beach House.
#103 - "Drunk", by 志樹 - When you buy one or more drinks at the Underground Bar.
#104 - "Where You Are Staring", by 水利 - When encountering a sane Shadow Woman on Day and Night Towers or Toy World.
#105 - "Fall", by ウィル - After falling down from completing the Penguin GB Game in Urotsuki's Dream Apartments.
#106 - "Red Book", by らう - After interacting with Oni Musume for the first time.
#107 - "Submerged Underwater", by 蒼椈森Haya - When using the Child or Stretch effect near the puppet theatre on the Ocean Floor.
#108 - "Chainsaw", by きなこもっちもち - After getting the Chainsaw effect.
#109 - "Circus Tent", by 山上下 - After finding the albino girl in the tent at The Circus and escaping without the clown trapping you.
#110 - "Plaster Cast", by 若 - After getting the Plaster Cast effect.
#111 - "Sink", by 東雪くらげ - When you reach the Ocean Floor for the first time.
#112 - "How Is This In My Room?", by ウイル - After encountering the long-haired girl in Urotsuki's Dream Apartments.
#113 - "dream", by tanita - After sleeping 35 times.
#114 - "! TP Human Sacrifice", by もけ子 - After Urotsuki gets crushed under one of the pillars in the Underwater Amusement Park.
#115 - "I Will Not Come Back, Box Child", by あきつ - When using the Bug or Fairy effect to make Hakoko pop her head out.
#116 - "Urotsuki", by 福野04 - When you have at least 22 effects (counting the Instructions).
#117 - "Without Zero", by さおみー - When encountering the XY twins in the Apartments.
#118 - "Bonk!", by アベル - After getting the Child effect.
#119 - "You Can't, Red", by 柑橘箱 - After getting the Red Riding Hood effect.
#120 - "Devas' Confinement", by 山上下 - After getting caught by all the Chasers on this Wallpaper. This can be easily accomplished in Onyx Tile World.
#121 - "Black Witch Invisibility", by 月夜 - After using the Invisible effect on the sane Shadow Woman found on the purple circle in the Mini Area of Toy World after interacting with her.
#122 - "Two Submarine People", by 凡 - When encountering the Commando and Provost-san.
#123 - "Whoa! Dazzling", by getabaki - When you enter the room with the silhouette on the ground in the Forlorn Beach House.
#124 - "Papa T", by 蒼 - When you interact with the Blue NPC in the Arrow Maze.
'#125', by れもん氏 - When you enter the Broken Faces Area for the first time.
#126 - "Tissue", by 闇月夜 - After getting the Tissue effect.
#127 - "Red Love", by 蒼空飴 - After getting the Chainsaw effect and sleeping at least 13 times.
#128 - "Amentia", by 柑橘箱 - After getting 22 effects.
#129 - "Urotsuki Covered in Blood", by もちもち - After Urotsuki gets crushed under one of the pillars at the Underwater Amusement Park.
#130 - "Tatami Room Loneliness", by １９０ When you visit the Tatami Room for the first time.
#131 - "A Chainsaw", by 幸付き - After getting the Chainsaw effect.
#132 - "In the Water Tank", by ウィル - After visiting the Power Plant and falling into one of the tanks.
#133 - "Residents of the Dream World", by 山上下 - After meeting all the characters on this Wallpaper (see below).
#134 - "Amusement Park Loneliness", by らう - After viewing the Lonely Urotsuki event in the Underwater Amusement Park and obtaining the Child effect.
#135 - "Little Red Riding Hood", by 闇月夜 - After getting the Red Riding Hood effect.
#136 - "Prince & Princess", by まこっち - After encountering the prince and princess cutouts in Theatre World.
#137 - "Shrine", by getabaki - When you enter the Shinto Shrine for the first time.
#138 - "Bathhouse Scene", by Level.21 - When you enter the Bathhouse for the first time.
#139 - "Everyone's Dream", by こな - After viewing the first Ending.
#140 - "Dolphin Puzzle", by yuanshang - After solving at least one Kura Puzzle.
#141 - "Flesh & Blood Babies", by こ（び） - When you fully explore Closet Pinwheel Path (This does not include the isolated section.)
'#142', by ゆづの - After playing for 30 minutes (not including time the menu is open).
#143 - "Fiction & Reality", by Torii - After seeing the monochrome boy change to red on the Namakubi Path in the Shinto Shrine.
#144 - "I Dreamed of the Universe.", by へっどふぉん - When you enter Flying Fish World for the first time.
#145 - "Sneering Shadow", by 178 - When you use the Telephone effect on Smile-San in Flying Fish World.
#146 - "Rainbow Bridge", by kmn - When you use the Teru Teru Bōzu and Rainbow effects to make a bridge at the Tribe Settlement.
#147 - "Those Who Lurk Underground", by ゆゆ - When you reach the Underground TV Complex for the first time.
#148 - "Soldier", by カイズ - When you go near the room with the army NPCs in the FC Basement.
#149 - "Momentary Break", by わたる - After you change into the swimsuit at the hotel in Japan Town.
#150 - "Starting the Pulse", by kmn - When you use the Lantern effect in Heart World.
#151 - "DimensionWorld", by ラギー - After seeing every minor event in Flying Fish World (see below).
#152 - "Haniwa", by ティックルポポ - After you view the Haniwa Dance event at the Haniwa Temple.
#153 - "Egg", by みけ - After visiting 95% (or more) of the accessible maps in the game.
#154 - "What Do You See?", by ティックルポポ - After interacting with the mirror behind the witch in Jigsaw Puzzle World while using the Marginal effect while the mirror is purple.
#155 - "Brink of the Sky in the Lost Forest", by カワシ - After going down a ladder in a room in the Forest Carnival.
#156 - "Toy Box", by こと - After you interact with the mirror behind the witch in Jigsaw Puzzle World, and then interact with it again using the Polygon effect when it turns purple.
#157 - "Imprisoned Fairy", by 向詠にいち - After getting the Fairy effect.
#158 - "Beginning From The End", by 気ヶ付き - After catching the underwater bus from the Trench Overlook in Atlantis.
#159 - "Her Favorite Things", by とーん - After either interacting with Shimofuri-tan or using the Cake effect near her in Cutlery World.
#160 - "Old Split Retro", by とーん - When using the Telephone Effect in the TV room in Flying Fish World.
#161 - "OS Three Sisters", by とーん - After using the Trombone effect on all the platforms where the colorful faires are stepping on in the Binary World.
#162 - "Never-ending Dream", by KYOU - After viewing Endings #1-4.
#163 - "That Eyeball", by 胃の結 - After sitting next to the gray NPC in the path that connects the Gray Road to Grass World.
#164 - "Moon Lake", by オレンジ１００％ - When visiting the Mermaid Moon Lake in Jigsaw Puzzle World.
#165 - "Michael", by 竹ノ花 - After fully completing the High Priestess Event in the Forest Carnival.
#166 - "Like Onsen-san" - After interacting with Onsen-San in Pillars World.
#167 - "True Identity", by 凪果さな - After looking at the Angel NPC using the Glasses effect in Fountain World.
#168 - "Welcome", by 凪果さな - When you enter Fabric World for the first time.
#169 - "In the sea, In a Dream", by こげ兎 - When entering the Flooded Baths from the bottom of the Reef of Atlantis.
#170 - "Air Bubbles", by えいり - After activating the Drowning event in the Depths.
#171 - "Into the Deep", by ネコノハヤシロ - After dropping the person on the other end of the rope down the well in the Fairy Tale Woods while using the Red Riding Hood effect.
#172 - "Hatake Light", by おぽ子 - When you enter Green Neon World for the first time.
#173 - "Angel", by miharu - After interacting with the piano in the left room of the Fountain House in Fountain World.
#174 - "Boat Trip", by ガン★カゼ - After riding the boats in the Abandoned Apartments, Underwater Amusement Park, Sunken City, and Forest Pier.
#175 - "Radio-kun", by おぽ子 - When interacting with the Alley Robot in the Dark Alleys
#176 - "Red Spider Lily", by 日陰 - When turning the Red Lily Lake upside down.
#177 - "Vomiting Melon", by にんふぇあ - After entering Flesh Paths World and finding the green fruit shown in this Wallpaper.
#178 - "A Myriad Of Shining Darkness" - After visiting both the Ocean Floor and Constellation World.
#179 - "Nice Sign", by 胃の結 - After turning invisible in the Danger Panic Zone.
#180 - "Dream Figure Folding Screen", by ラギー - When you enter Heian Era Village.
#181 - "Bright!", by モカ - After visiting the Cosmic World for the first time.
#182 - "U's Room", by さんびゃくななじゃう - When you use the Glasses effect in front of Seishonen.
#183 - "At The Bottom Of The Water", by クスゥ - When first entering Huyure-chan's area.
#184 - "Whale Meets Girl", by arkham - When you find the Ark in the Scorched Wasteland.
#185 - "A Gentle Light", by メロンまっちゃ - After using the Lantern effect on the white NPC in Neon Candle World.
#186 - "White Sand Beach and Wolf Boy", by アマクサ - After getting the Wolf effect.
#187 - "Jellyfish Aquarium", by ninoruko - After entering the aquarium in Overgrown City.
#188 - "I Found It", by mizkura - When entering Constellation World for the first time.
#189 - "I Wonder If They Will Come Again", by chugo - After interacting with the shop keeper in Japan Town, or upon entering The Hand Hub for the first time.
#190 - "The Sea is Wide", by 凹にゃん - When you go to the Realistic Beach.
#191 - "Torch", by なそあん - When you get the Lantern Effect.
#192 - "Just Fit!", by TaSK - After getting the Drum effect.
#193 - "Incomplete", by かわわらわ - Unlocked by encountering the giant ball of scrap iron in Overgrown City.
#194 - "Secrecy", by noildoof When entering the Polluted Swamp.
#195 - "Unbearable...", by 慶吉朗 When using either the Penguin or the Wolf effects on the sea sponge found in the Reef.
#196 - "Chartered Pig Farm", by 慶吉朗 - When you first enter the Mutant Pig Farm.
#197 - "Guardian Of The Forest", by noildoof - After chainsawing the forest guardian in the Forest Pier or revisiting the area it's found in.
#198 - "Courtyard", by noildoof - After visiting the secret garden in the Deserted Town.
#199 - "Dark Road", by noildoof - After chainsawing both the male and the female NPCS that are sitting under a wooden structure in Tulip Lamp World.
#200 - "Black Cave", by noildoof - Seeing the Dream of Roses event in Red Rock Caves

201-300

#201 - "Book Within a Dream, Dream Within a Book", by 撶山かなり - When you find the same sculpture in the Eyeball Archives.
#202 - "Report Of A Certain Capture Experiment", by カワシ After completing the Hallucination event.
#203 - "All Living Things Must Perish", by noname - Look up inside the building on the island in Polluted Swamp
#204 - "Prologue", by noname - After visiting the end of the Cog Maze and visiting the Forest Pier from there.
#205- "Lonely", by noname - After encountering the shadow figure sitting on a bench in the Deserted Town.
#206 - "At The Marquis' Mansion", by noname - After exploring the Monkey Mansion.
#207 - "Cyber", by 慶吉朗 - After entering the Cyber Maze for the first time.
#208 - "Always Watching", by 慶吉朗 - After passing throught The Back Alley
#209 - "Lord of 20.180", by クロワ - After seeing the Sea Monster in the Neon Sea.
#210 - "End of the Festival", by クロワ - After seeing the "Honoring the Dead" event in Dream Mexico.
#211 - "Sepia Toned Water's Surface", by Mario - After entering Sepia Clouds World for the first time.
#212 - "Urotsuki and the Monochrome Castle", by お菊 - After equipping the Gakuran effect near Gakuran.
#213 - "Moai", by Hans - After interacting with the Moai Bro in the Sea of Clouds.
#214 - "I'm Booored", by お菊 - After encountering the Cyborg girl in Tesla Garden.
#215 - "Underwater Bench", by ninoruko - After sitting on the bench in The Trench Overlook.
#216 - "Newborn Leaves", by ec - After entering Grass World for the first time.
#217 - "Meeting", by お菊 - After seeing Hakoko and Megusuri Uri in the same room.
#218 - "From the Graveyard to the Cradle", by お菊 - After visiting some areas in the Hospital and Graveyard World (see below).
#219 - "bottomless", by ネコノハヤシロ - After activating the Drowning event in the Depths.
#220 - "Empty Footsteps", by カワシ - After getting the Bike effect and the Wolf effect.
#221 - "Don't Come Near", by ネコノハヤシロ - After getting the Wolf effect.
#222 - "EYE I EYE", by BSL - After interacting with all the NPCs in the picture (see below).
#223 - "False Shoal", by noildoof - After entering False Shoal for the first time.
#224 - "The Light and Dark of the House in the Shoal", by noildoof - After pressing the switch in Marina's House.
#225 - "Resident of the Dream Island", by noildoof - After entering the Titan's Pier.
#226 - "Rose Church", by noildoof - After visiting the Rose Church for the first time and obtaining Menu Theme #12.
#227 - "First Blockade", by noildoof - After entering the Transmission Tower World for the first time.
#228 - "Surrounded by Lotus Underwater", by quoiDraught - After seeing the chairs and tables in Lotus Waters.
#229 - "Stop Right There!", by お菊 - After getting the Crossing effect.
#230 - "The Things that Create Me", by 真白カコイ - After viewing Ending #1.
#231 - "Criss Cross" - After viewing at least two different endings (Except Glitch Ending and Ending #?).
#232 - "Reflecting Water", by 撶山かなり - After lighting the lotus tree in Cloudy World with the Lantern effect.
#233 - "Into the Dream", by お菊 - After getting the Eyeball Bomb effect.
#234 - "Third Blockage", by ぬぬさゆ - After entering Old Train Station B from the Mirror Room.
#235 - "Wastebasket", by お菊 - After visiting the main areas of the Riverside Waste Facility and the interiors.
#236 - "Awakening in the Cave", by ラギー - After entering the Snowy Forest for the first time.
#237 - "Strawberries", by セチ - After entering the main area of Cotton Candy Haven for the first time.
#238 - "Two Worlds", by まいたけ - After entering the area outside the Eye Shop in Visine World and the Dressing Room or Fabric World for the first time.
#239 - "Sheep and Dreams", by けこりん - After sleeping 20 times.
#240 - "Candy", by 真白カコイ - After entering the Candy Cane Fields for the first time.
#241 - "Octopus Man", by 真白カコイ - After using the Fairy effect on Tako Otoko.
#242 - "Pyramids", by 2i9 - After entering the Stellar Mausoleum for the first time.
#243 - "Shoal", by noildoof - After entering the Hidden Shoal for the first time.
#244 - "Ceiling", by noildoof - After entering The Ceiling for the first time.
#245 - "Lord of the Well", by noildoof - When meeting the creature in the well in the Abandoned Apartments.
#246 - "nAmElEsS sPiRiT", by ルリ - After entering CMYK Tiles World for the first time.
#247 - "Huge Ruins", by noildoof - After entering the Radiant Ruins for the first time.
#248 - "Star Path", by sillyzawa - After entering Star Building for the first time.
#249 - "Metaro!", by sillyzawa - After entering Ronsutoka's Room in the Silent Sewers for the first time.
#250 - "Looking in the Mirror", by sillyzawa - After using the Glasses effect in the Mirror Room.
#251 - "Space Swimming", by sillyzawa - After entering Flying Fish World for the first time.
#252 - "Like a Lullaby", by kris - After entering the Magnet Room for the first time.
#253 - "Juice", by ガン★カゼ - After buying from Vending Machines 15 times and having at least 15 hearts.
#254 - "Secret Base in the Attic", by ガン★カゼ - After interacting with the telescope in the attic of the Infinite Library and it doesn't show only white.
#255 - "Life's Relaxation", by ガン★カゼ - After interacting with the NPC at the third room in the Boogie Street and the lady with gray coat in the Flooded Baths.
#256 - "Clock Placed", by ガン★カゼ - After entering the Dark Warehouse for the first time.
#257 - "Bodhisattva", by ガン★カゼ - After interacting with the Buddha statue in the Museum with the Glasses effect equipped.
#258 - "Hidden Room 1", by noildoof - After entering the hidden room in Rough Ash World for the first time.
#259 - "Hidden Room 2", by noildoof - After entering the hidden room in Green Neon World for the first time.
#260 - "Hidden Room 3", by noildoof - After entering the hidden room in Flying Fish World for the first time.
#261 - "Water Labyrinth", by noildoof - After entering the Flooded Dungeon for the first time.
#262 - "NineTiles", by 2i9 - After entering the Rainbow Tiles Maze for the first time.
#263 - "Ancient Crypt", by 2i9 - After entering the Ancient Crypt for the first time.
#264 - "Stacking ash on Riverside Waste Facility", by クロワ - After seeing the Snowy Path in Riverside Waste Facility.
#265 - "Gather in the Light", by クロワ - After entering the Celestial Garden for the first time.
#266 - "Flowers and Fairies", by クロワ - After entering the Fairy's cave for the first time.
#267 - "Under the Night Sky", by クロワ - After entering the Cocktail Lounge for the first time.
#268 - "Listen to the Darkness", by クロワ - After getting caught by the Shadow Lady in the Dark Warehouse.
#269 - "fog" - After entering the Lost Creek for the first time.
#270 - "In a Fluffy Dream", by mama - After getting hold of the key from the doll in Cotton Candy Haven for the first time.
#271 - "Verdant Promenade", by noildoof - When you enter the Verdant Promenade for the first time.
#272 - "Electronic Rose", by -Drifter - Interact with any of the computers in Neon Caves.
#273 - "I Like Twintails", by 永氷水 - Enter Twintail-chan's house in Hand Fields, with the Twintails effect.
#274 - "Stargazing Rooftop and the Cat", by 投棄性 - Interact with the cat in the rooftops of Techno Condominium.
#275 - "Dream Foods", by ローンタワー - Have at least 30 HP/hearts (Purchase at least 29 items from vending machines)
#276 - "Plankton", by -Drifter - Enter the Ocean Subsurface for the first time.
#277 - "FC Caverns", by roer - Enter the watery section of the FC Caverns.
#278 - "Sleeping Stars", by せにゅしあ - Use the light switch in the Calcarina Sea for the first time.
#279 - "A New Journey", by Kiko Eleanor - View Ending 4.
#280 - "Tomb of Velleities", by LiquidTc - Enter the Tomb of Velleities for the first time.
#281 - "Igloos", by maptsuki - Interact with the inhabitants of the igloos of Whipped Cream World, as shown in the Wallpaper.
#282 - "Cosmic Isolation", by Guccelia - Enter the Erratic Pillar Lands for the first time.
#283 - "Ice and Stars", by ゼシカ - Enter the Wooden Polycube Ruins for the first time.
#284 - "Cave Underneath the Trees", by Yuunarii - Enter the mushroom cave in the Floating Catacombs for the first time.
#285 - "Resting in the Shade", by Kiko Eleanor - Enter the Viridescent Temple for the first time.
#286 - "To the Dream's End", by 夢赤狐 - Enter Garden World with the Bike.
#287 - "Flesh Path", by Gabaro - Enter the Flesh Paths World for the first time.
#288 - "Beroberonbaa", by maptsuki - Interact with the box with the tongue in the northern section of Dream Park.
#289 - "Coral Sea", by あいれす - Enter the Star Ocean for the first time.
#290 - "Good Night", by Kiko Eleanor - Enter the dimly-lit bedroom in the Spaceship for the first time.
#291 - "DEEP SEA", by LiquidTc - Enter the Ocean Subsurface for the first time.
#292 - "To the End of the Journey", by せにゅしあ - Enter the Tan Desert and the Evergreen Woods with the Bike and Wolf effects obtained.
#293 - "Chance Meeting", by 櫻 - Enter the submarine in the Docks, then encounter the large whale in the docks of Paradise.
#294 - "Welcome to the Land of the Departed", by maptsuki - Enter the Netherworld for the first time.
#295 - "Is It Delicious?", by せにゅしあ - Approach the giant, pink monster eating a tree in Container Forest with the Lantern equipped and the Cake obtained.
#296 - "Sweet Dreams", by Kiko Eleanor - Sleep in Firehead's bed in Aquatic Cube City.
#297 - "Munching Time", by maptsuki - Approach the giant, pink monster eating a tree in Container Forest with the Lantern equipped.
#298 - "Two Sides of the Same Coin", by せにゅしあ - Enter the Void and the Voiδ for the first time.
#299 - "Urotsuki and the Zodiac", by ウエストン - Enter the Constellation World for the first time.
#300 - "Here's an Apple", by シキノソラ - Visit the young girl of the Snowy Village with the Red Riding Hood effect equipped.

301-400

#301 - "Chocolate Dust", by Kiko Eleanor - Enter the Chocolate Tower for the first time.
#302 - "Day and Night", by LiquidTc - Enter the Calcarina Sea for the first time.
#303 - "Penguin", by -Drifter - Obtain the Penguin effect.
#304 - "Sailor Disco", by ごうてん - Encounter Firehead in the Aquatic Cube City.
#305 - "Noise", by -Drifter - Enter the Static Labyrinth for the first time.
#306 - "Chubbies in a Pot", by おつけもの - Enter the Downfall Garden for the first time.
#307 - "Water Lantern", by Kiko Eleanor - Use the Lantern in Water Lantern World, triggering the area's BGM.
#308 - "Netherworld", by STUDYMAN99 - Enter the Netherworld for the first time.
#309 - "Visiting Your Mother", by クリスタルクレシーオン - Enter the Mother's Room in Urotsuki's Dream Apartments.
#310 - "Type: ∞", by 七月 - Obtain Menu Types 11, 28, 29, 31, and 45.
#311 - "Abandoned Dreadnought", by Averageavocado - Enter the Abandoned Dreadnought for the first time.
#312 - "Mausoleum", by ninoruko - Enter the Stellar Mausoleum for the first time.
#313 - "Desolate Indigo", by Raptarr8 - Take the taxi in Purple World.
#314 - "(unnamed)", by 浪藻そぞろ - Sleep at least once.
#315 - "Love's Pathway", by 空澄コルネ - Obtain Menu Theme #36.
#316 - "cloakedpillars", by metachirality - Enter the Cloaked Pillar World for the first time.
#317 - "Reflecting Water", by Mad Project - Enter the Cloudy World for the first time.
#318 - "Burning Pudding", by 鉾立真虚人 - Enter the Pudding World for the first time.
#319 - "The dream is not over yet", by Mad Project - View Endings 1 to 4.
#320 - "Laboratory Director", by 空澄コルネ - Meet the Laboratory's head scientist.
#321 - "Contact" - Save the Victim in the Snowy Forest, and interact with the phone booth in Fossil Lake.
#322 - "Sand Town TV", by ぬぬさゆ - Enter Isometry World for the first time and trigger the ending sequence in the TV there.
#323 - "Ancient Remains", by noildoof - Enter Fossil Lake for the first time.
#324 - "Warako-san", by 空澄コルネ - Enter Vase World for the first time.
#325 - "Today, I'll have the karaage set.", by 隣のワカメ - Enter the Dining Hall for the first time.
#326 - "Viridescence", by Gaida the Duck - Enter the Viridescent Temple and the Floating Catacombs for the first time, with the Bike and Wolf effects obtained.
#327 - "Eye", by 鉾立真虚人 - Use the Eyeball Bomb effect at least once.
#328 - "Spring waiting room" - Save the Victim in the Snowy Forest and unlock the connection to the area from Ripple Passage.
#329 - "Hotcake", by ぬぬさゆ - Enter Pancake World for the first time.
#330 - "Fish and Fairies", by 鉾立真虚人 - Use the Fairy Effect near Tako Otoko.
#331 - "Ripple walk", by Beloth - Enter Ripple Passage for the first time.
#332 - "Falsehood Shoal's House", by noildoof - Enter Ahogeko's House for the first time.
#333 - "What's in the end of the tunnel?", by Beloth - Enter the NES Glitch Tunnel for the first time.
#334 - "KidoairaClover", by maptsuki - Meet Kidoairaku-kun, the yellow suited person, in the Underground TV Complex.
#335 - "rider", by 鉾立真虚人 - Crash with Rider Urotsuki in the Highway.
#336 - "(unnamed)", by thingum - Obtain the Dice effect.
#337 - "Caseinated Dream", by Cmax - Enter Concrete World for the first time.
#338 - "Tracing from the void to the moon" - Make your way to Lavender Waters using an specific route.
#339 - "Dressing Room", by Mad Project - Enter the dressing room of Firehead's house in Aquatic Cube City for the first time.
#340 - "TV Room", by sodaodaoda - Enter the TV Room for the first time.
#341 - "Fabric Planet", by あいれす - Enter Fabric Planet for the first time.
#342 - "NeverEnding", by 鉾立真虚人 - View Ending ?.
#343 - "Welcome, Dream Guest", by maptsuki - Enter Cyberspace for the first time.
#344 - "Hakoko", by Mad Project - Encounter Hakoko in Megusuri Uri's shop.
#345 - "Even if you cough", by 鉾立真虚人 - Chainsaw Urotsuki's reflection in the Mirror Room and trigger an event with the lone Urotsuki in Static Noise Hell.
#346 - "Black Rain", by noildoof - Enter Rainfall Ruins and interact with the umbrella creature.
#347 - "Shelter from the Rain", by 時斗静刃 - Enter Lotus Park for the first time.
#348 - "Maid", by Mad Project - After combining the Twintails effect with the maid outfit in the Dressing Room.
#349 - "Sister in the Apron", by 空澄コルネ - Meet the Mysterious Maid in either the Hospital, Sky Kingdom, Train Tracks, or Construction Frame Building.
#350 - "Rest", by Mad Project - Enter the Monochrome Fields for the first time.
#351 - "Three Roads' Gathering", by maptsuki - Enter the Tricolor Passage, Pastel Sky Park, and Cactus Desert for the first time.
#352 - "Beautiful Garden Toilet Seat", by Beloth - Enter the restroom in the Eyeball Cherry Fields for the first time.
#353 - "Sheer Fiction", by 海月夜澪 - Exit the Abyss of Farewells through the serpentine creature.
#354 - "Perfect Circle of Friends", by ミズ - Use the Marginal Effect in Pastel Sky Park.
#355 - "???-tsuki", by noildoof - Meet ???-tsuki in the Second Nexus.
#356 - "Moon Sleeping in the Sky", by Beloth - Enter Astral World for the first time.
#357 - "Silent Sewers", by noildoof - Enter Silent Sewers for the first time.
#358 - "Mazenda Master", by 空澄コルネ - Enter the Cyber Bar for the first time.
#359 - "In the Fabric Planet", by alcoco - Enter the Fabric Planet, use the Spring effect to get onto the roof and view the moon.
#360 - "Drear graffiti", by Gray - Enter Dreary Drains for the first time.
#361 - "Fuchsia Suburbs B", by gabaro - Enter Fuchsia Suburbs B for the first time.
#362 - "Happy Halloween", by 小可 - Wear the costume in Halloween Forest for the first time.
#363 - "Piano Girl", by ブラッキー - Enter the Piano Girl's Room for the first time.
#364 - "Broom Trail", by ＝ｔ - Enter the bedroom in Nocturnal Grove for the first time.
#365 - "Panda-ko Panda", by maptsuki - Enter the Panda Checkers Area for the first time.
#366 - "Sculpture Park", by 小可 - Equip an umbrella in the Sculpture Park for the first time.
#367 - "Cyborg", by Ani - See the Operator Cyborg event in the Rusty Urban Complex for the first time.
#368 - "Silent Dweller", by Gray - Enter the Silent Sewers for the first time.
#369 - "Quiet forest", by renami - Enter the Verdant Promenade for the first time.
#370 - "Tricolore R.Y.B.", by maptsuki - See various Red, Yellow, and Blue denizens. (see below).
#371 - "orbs", by finesse - Enter the Candy World for the first time.
#372 - "game center", by dmdmkun - Enter the Travel Hotel for the first time.
#373 - "Highway", by JIVV - Enter the Highway for the first time.
#374 - "Flowery path", by 小可 - Enter the Garden of Treachery for the first time.
#375 - "Snowy feeling", by renami - Enter the main area of the Snowy Village for the first time.
#376 - "unease", by ＝ｔ - Enter the Erratic Pillar Lands for the first time.
#377 - "Rest in staircase", by 小可 - Enter the Travel Hotel for the first time.
#378 - "Rainbow Vomit", by Pumpkin Soda - See the Screaming Forest event in Bright Forest for the first time.
#379 - "Viridescent", by STUDYMAN99 - Enter the Viridescent Temple for the first time.
#380 - "Sky Fish", by Apeman - Enter the Flying Fish World for the first time.
#381 - "mushsuki", by pestoanchovi - Enter the Mushroom Room for the first time.
#382 - "Observatory", by 小可 - See the satellite dish in Foliage Estate for the first time.
#383 - "Wind Turbine Plateau", by ブラッキー - See the leaning tower in Wind Turbine Plateau for the first time.
#384 - "Welcome to the Dream Park!!", by ほらつき - Enter the Treetops in Dream Park and find a Guardian for the first time.
#385 - "Backlight", by maptsuki - Enter the silhouette alley in the Amorphous Maroon Space for the first time.
#386 - "lovers dance", by rollaby - View the Mechanical Heart Act in Chainlink Lees for the first time.
#387 - "Day and Night's Reflecting Waters", by 小可 - Enter the Luminous Lake for the first time.
#388 - "Rainbow insanity", by sodaodaoda - View Channel 15 in the TV Room for the first time.
#389 - "Buckets As Blue as the Sea", by maptsuki - Enter the fisherman's bucket in the Dream Beach and interact with the fish inside for the first time.
#390 - "Purple Lake", by 小可 - Enter Lavender Waters for the first time.
#391 - "Peaceful rain", by renami - Enter the lower parts of Azure Garden for the first time.
#392 - "Waiting...", by studyMAN99 - Enter the Laundromat for the first time.
#393 - "Reflecting Clouds", by 小可 - Enter the Astral World for the first time.
#394 - "decrepit dwellings", by dmdmkun - Enter the bedroom's balcony in the Decrepit Dwellings for the first time.
#395 - "Unrelenting Prison", by maptsuki - Enter the Forest Cavern for the first time.
#396 - "Guzzle", by 小可 - Enter the Aquatic Cafe for the first time.
#397 - "Ruins Storekeepers", by noogats - Visit the various residents of the Shop Ruins for the first time. (see below).
#398 - "Spike Spike", by Play Dash - Enter the Geometry World for the first time.
#399 - "Autumn light", by renami - Enter the Ruined Garden for the first time.
#400 - "Teru Teru Bōzu", by nostaplant - Obtain the Teru Teru Bōzu effect for the first time.

401-835

#401 - "Aquatic Cafe", by influenza - Enter the Aquatic Cafe for the first time.
#402 - "Below the Flower Lantern", by beloth - Enter the passage to Azure Garden from Foliage Estate for the first time.
#403 - "Hotel", by ribon996 - Enter the Travel Hotel for the first time.
#404 - "Underground office", by 小可 - Enter the Hidden Garage for the first time.
#405 - "B O I N G !", by rollaby - Enter the Blob Desert with the Spring effect obtained.
#406 - "An hour until you come along", by ブラッキー - Enter Azure Garden for the first time.
#407 - "Sunlight", by ＝ｔ - Enter the Viridescent Temple for the first time.
#408 - "Peaceful bedroom", by 小可 - Enter the bedroom in the Nocturnal Grove for the first time.
#409 - "Into the deep", by Ani - After seeing many seas for the first time. (see below).
#410 - "Classic Hotel", by 小可 - Enter the Travel Hotel for the first time.
#411 - "Vending Machine Factory", by 小可 - See the cat in Vending Machine Factory. (see below).
#412 - "Frigid Embrace", by ブラッキー - Descend down into the Ocean Subsurface for the first time.
#413 - "Sweets-chan", by 心脳ハナ - After using the Cake effect on Sweets Musume.
#414 - "Comfort zone", by ペーマ - Unlocked after sleeping 15 times.
#415 - "car accident", by dmdmkun - After entering the car in Hidden Garage and sleeping in it or crashing it.
#416 - "Titan's Rage", by Pumpkin Soda - After seeing the Colossus of Rhomb in Square-Square World.
#417 - "Lovely new dress", by 小可 - After equipping the pink dress in Shop Ruins.
#418 - "Gold Purple Clock Tower", by 小可 - Enter the Aureate Clockworks for the first time.
#419 - "Lovely Usamimi", by Nico - Obtain the Bunny Ears/Usamimi effect for the first time.
#420 - "Monolith String", by Gray - Enter both the Twilight Park and Monolith Jungle for the first time.
#421 - "Freedom", by Shadok - Obtain the Bug effect for the first time.
#422 - "EtherWonder", by Autumn - Enter the Ether Caverns for the first time.
#423 - "Zodiac Fortress", by FelixWrath - Enter the Zodiac Fortress for the first time.
#424 - "Sketch World", by nostaplant - Enter the Sketch Plains for the first time.
#425 - "Our Hero", by MillieAmp - After entering the castle in Fantasy Isle for the first time.
#426 - "Ladder", by ribon996 - After descending from the Wintry Cliffs to the Tomb of Velleities.
#427 - "Matrix Room", by Ani - Enter the Aureate Clockworks for the first time.
#428 - "Stellar Feeling", by renami - Enter the Star Building in the Constellation World for the first time.
#429 - "void", by rapukori - Enter the inescapable black void in Mare Tranquillitatis for the first time.
#430 - "Repressed Memories", by Jojogape - Enter the Atelier for the first time.
#431 - "Poseidon Plaza", by 小可 - Enter the Poseidon Plaza for the first time.
#432 - "目玉焼き", by ぬぬさゆ - Enter the Fried Egg Zone of Nazca Valley for the first time.
#433 - "工場危機", by Mad Project - Enter the Vending Machine Factory for the first time.
#434 - "new world line", by dmdmkun - View the Glitch Ending.
#435 - "暗中の背後", by Beloth - Enter the Infinite Library for the first time.
#436 - "カクテルラウンジでひとやすみ", by NALUDAYO - Enter the Cocktail Lounge for the first time.
#437 - "rainy day", by dmdmkun - Enter the Sculpture Park for the first time.
#438 - "黒魔女の茶会", by 小可 - View the two shadow ladies in Twilight Park.
#439 - "表情豊かんばん", by maptsuki - Enter the Yellow Diamond Area of Obstacle Course for the first time.
#440 - "1-celled Mirror", by Shoal-senpai - Use the Boy effect in the room of Apartment Amoeba in Urotsuki's Dream Apartments.
#441 - "blooming flowers", by dmdmkun - Enter the Floral Vortex of Flooded Dungeon for the first time.
#442 - "Infinite Walking", by rapukori - Enter the Infinite Library for the first time.
#443 - "The night room", by Mad Project - Insert the key in the music box in Cotton Candy Haven.
#444 - "新月をまたぐ飛行", by rollaby - Fly off the roof's edge in Techno Condominium.
#445 - "赤い街灯の下", by NALUDAYO - Enter the Red Streetlight World for the first time.
#446 - "Wintry Nature", by renami - Enter the room with flowers in Snowy Forest for the first time.
#447 - "Fungus", by Froggo - Enter the mushroom's girl room in Azure Garden for the first time.
#448 - "Raspberries and Blueberries", by pao - Enter the Magical Passage for the first time.
#449 - "水中植物", by princess crab - Enter the Floral Vortex of Flooded Dungeon for the first time.
#450 - "トマトの世界", by 空澄コルネ - Enter the Tomato World for the first time.
#451 - "これで私も主役", by Beloth - Enter the Poseidon Plaza for the first time.
#452 - "Shadow Estate", by Kylie - Enter the Shadow Lady Estate for the first time.
#453 - "memories", by Mewtryoshka愛 - Insert the key in the music box in Cotton Candy Haven.
#454 - "幽谷", by 友達/キャべつ - Enter the Nocturnal Grove for the first time.
#455 - "黒と白の学舎(まなびや)", by sen - Enter the building of Monochrome School for the first time.
#456 - "rainy town", by dmdmkun - Enter the Rainy Town for the first time.
#457 - "World of Wonders", by Mad Project - Enter the Viridescent Temple entrance for the first time.
#458 - "Bugs are Friends!", by Skellieton42 - Enter the Entomophobia Realm for the first time.
#459 - "dimly lit room", by dmdmkun - Enter the Antiquated Resthouse of Verdant Promenade for the first time.
#460 - "Scenery of Hope", by renami - See the Faraway Scenery in Foliage Estate.
#461 - "ダークネクサス", by mitzyrie - Enter the Dark Nexus for the first time.
#462 - "空き箱", by miau - Enter the Obentou World for the first time.
#463 - "天上", by やわらか - Interact with the seven-tailed humanoid fox in Red Lily Lake.
#464 - "Resentment of Age", by eviled - Activate the Old Urotsuki event in Lorn Tower.
#465 - "ツインテールズ", by あいれす - View the different Twintails designs. (see below).
#466 - "Anonymous Letter", by Mad Project - Enter the Mailbox for the first time.
#467 - "ポニテ博士", by StudyMan99 - Enter the Space Construction Site of Nazca Valley for the first time.
#468 - "Wishing Sky", by renami - Enter the rooftop area of Shallows of Deceit.
#469 - "tea time", by dmdmkun - Enter the Lotus Waters for the first time.
#470 - "菜の花畑", by ribon996 - Enter the Rapeseed Fields for the first time.
#471 - "weird amusement park", by dmdmkun - Enter the Dungeon in Underwater Amusement Park for the first time.
#472 - "Yellow Rain", by Skuyume - Enter the Sea Sponge Path of Star Ocean for the first time.
#473 - "意味", by 小可 - Sleep in the bed in the Nostalgic House.
#474 - "翠緑の楼", by rowan - Enter the Green Tower for the first time.
#475 - "失われた浅瀬", by 小可 - Enter the Lost Shoal for the first time.
#476 - "看守", by あいれす - Enter the Funeral Prison for the first time.
#477 - "氷漬けの街", by ぬぬさゆ - Enter the Snowy Suburbs for the first time.
#478 - "Lotus Light", by renami - Enter the Lotus Lamp Room in Misty Bridges for the first time.
#479 - "さよおならカーニバル", by ぬぬさゆ - Make the column display "Goodbye" in Underwater Amusement Park.
#480 - "Hidden Away", by Pumpkin Soda - Open the closet in the Nostalgic House.
#481 - "死線", by やわらか - Use the Crossing effect in The Monster's Jaw.
#482 - "Mansion's Cute Cat", by renami - Enter the Shadow Lady Estate for the first time.
#483 - "Crying Blood", by Pumpkin Soda - Equip the Marginal effect in the Crying Eyes cave in Cloudy World and look up.
#484 - "Eye Contact", by Myeri - Enter the Shadow Lady Estate for the first time.
#485 - "Statue of the Valley", by StudyMan99 - Enter the Nazca Valley for the first time.
#486 - "鏡よ鏡", by 友達/キャべつ - Enter the Mirror Room of Day and Night Towers for the first time.
#487 - "Snack Dreams", by renami - Enter the Snack Gallery for the first time.
#488 - "Underground Resting", by Sniperbob - Enter the Underground Lake for the first time.
#489 - "dance a waltz", by dmdmkun - See The Nail Lady event in Nail World.
#490 - "月夜の地平線", by ani - See the event in Twisted Thickets.
#491 - "Serene Islands", by renami - Enter the Blue Cactus Islands for the first time.
#492 - "ぷにークスリマス！", by ぬぬさゆ - Enter the Sherbet Snowfield for the first time.
#493 - "rainbow painting", by dmdmkun - See the rainbow graffiti in Graffiti City.

Specifications

Wallpaper #43

Enter the southernmost room of the Dark Room, where Oni Musume is located.
Enter the Apartments.
Interact with all the books in the first three rows of the Library.
- This includes the book that serves as a shortcut to the Apartments.
- If the book has more than one page, check all pages.
- In the third row, the book two shelves to the right from the ladder is not required for this wallpaper.

Wallpaper #89

Enter Chocolate World.
Enter Graveyard World.
Enter the chainsaw area in the Hospital Outskirts.
Enter Japan Town or the Maiden Outlook.
Enter the Sewers found after Japan Town or The Hotel in Japan Town.
Enter Garden World (Daytime).
Enter Sign World A.
Enter Visine World and the path to Guts World from this area.
Enter the Hourglass Desert.

Wallpaper #97

Set a Monmon (spherical bug creature) on fire using the Lantern in Marijuana Goddess World
Go into the small room backstage in the Dark Room's theatre where the mushroom creatures are.
Touch the piano in the Snowy Pipe Organ that takes you to Atlantis.
Visit the river in the Tribe Settlement.
Enter the TV gallery in the pink faces area at the Underwater Amusement Park
Watch the pyramid dancers event in the brown eye area at the Underwater Amusement Park
Interact with either of the pink / blue NPCs in the pink TV faces area at the Underwater Amusement Park, or chainsaw the blood-vomiting character in the secret room.
Visit Farm World A.
Enter Farm World B from Rough Ash World.
Find the submarine at The Docks.
Enter the UFO in the Head Wasteland.

Wallpaper #133

Interact with the blue creature at The Hand Hub or the one at Japan Town.
Interact with Anubis at the Hourglass Desert
Interact with one of the purple creatures at Graveyard World.
Interact with the Purple Demon at the Art Gallery.
Watch the pyramid dancers event in the brown eye area at the Underwater Amusement Park.
Interact with the floating blue creature at the Day and Night Towers.
Interact with the creatures on the other side of the river at the Tribe Settlement.

Wallpaper #151

Get the Glasses Effect from the Dark Museum
Visit Smile-San and use the telephone effect to make him laugh.
Use the fairy effect in the Urban Street Area to make the turntables appear, then lay down a chill jam on them.
See Nichiyo-san at the bus stop while she is in sprite form, on the way to Urotsuki's Dream Scene. (1/8 chance every time you enter the room)
Go to the monochrome room and interact with the big eye on the wall, then watch the fullscreen event.
Go to the TV room and use the telephone effect to cover the screen with static.
Go to the Space Playground and unequip the spacesuit effect, then watch the fullscreen event.
Sit on the block in the Twin Mountains section in Flying Fish World.

-

In addition to these requirements, you must have visited various areas and unlocked their BGMs:

(Still mostly in Flying Fish World, for more information follow the link.)

The area with spinning clocks
The Monochrome Room with the large eye
The Balcony in helmet girl's room
The Moonlit Purple Balcony
Flying Fish World's "hidden seed room" [For ED06]

(You must have the Glasses effect to trigger the event there.)

The small playground in Space

Wallpaper #218

Visit Graveyard World.
Visit the passage between Garden World and the Hospital.
Enter the third door from left to right in the first corridor of the Hospital.
Get the Grave Effect

Wallpaper #222

Watch the pyramid dancers event in the brown eye area at the Underwater Amusement Park.
Interact with Odorika while having the Maiko effect equipped.
Pay for a drink at the bar in Japan Town.
Enter Dream Mexico.
Enter to the area behind the counter in the Eyeball Archives.

Wallpaper #338

Please note to specifically enter the Mushroom Room in Floating Catacombs. Missing it will prevent unlocking the wallpaper.

The route that must be taken is the following:

Nexus → Marijuana Goddess World → Dark Room → Snowy Forest → Techno Condominium → Cotton Candy Haven → Wooden Polycube Ruins → Nocturnal Grove → Lost Creek → Cloaked Pillar World → Viridescent Temple → Floating Catacombs (Mushroom Room) → Fossil Lake → Subterranean Plant → Aurora Lake → Rainfall Ruins → Lavender Waters

Wallpaper #370

Play the Red Blue Yellow minigame at least once.
Go to Sky Kingdom through the Apartments connection.
Interact with the machine in the Magnet Room.

Wallpaper #397

Enter the Shop Ruins.
Enter the Infirmary, Drum Room, or the Chemistry Room in the Shop Ruins.
Enter the Chemical Storage also in the Shop Ruins.

Wallpaper #409

In no particular order.

Enter the Ocean Subsurface.
Enter the Ocean Floor.
Enter Atlantis.

Wallpaper #411

Keep reentering and exiting the factory until the cat appears in the garage on the left. It has a 1/5 chance of appearing every time you enter.

Wallpaper #465

In no particular order.

Get the Twintails Effect from the The Deciding Street.
Enter the Broken Faces Area.
Enter in the ???-tsuki's Room in The Second Nexus.
Enter in Lotus Park.

Removed or modified wallpapers

"Even Without Support" - Oldest known version of #44.
"Even Without Support" - Old version of #44.
"Dolphin Puzzle" - Old #140, unlocked by unlocking all kura puzzles and solving atleast one.
"Momentary Break" - Old version of Wallpaper #149, likely removed for being too explicit.
"Like Onsen-san" - Old Wallpaper #166 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 20 times.
"Air Bubbles" - Old Wallpaper #170 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 34 times.
"Boat Trip" - Old Wallpaper #174 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 16 times.
"Red Spider Lily" - Old version of Wallpaper #176.
"Bright!" - Old Wallpaper #181 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 30 times.
"Jellyfish Aquarium" - Old Wallpaper #187 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 22 times.
"Torch" - Old version of Wallpaper #191.
"Incomplete" - Oldest version of Wallpaper #193. Replaced at request of the author.
"Incomplete" - Old Wallpaper #193 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 24 times.
"Guardian Of The Forest" - Oldest version of Wallpaper #197 from pre-version 0.113, unlocked after chainsawing the guardian in the Forest Pier.
"Guardian Of The Forest" - Old Wallpaper #197 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 4 times.
"Courtyard" - Old Wallpaper #198 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 12 times.
"Dark Road" - Old Wallpaper #199 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 8 times.
"Prologue" - Oldest version of Wallpaper #204 from pre-version 0.113, unlocked after entering the Forest Pier from the Cog Maze.
"Prologue" - Old Wallpaper #204 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 2 times.
"Lonely" - Old Wallpaper #205 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 14 times.
"bottomless" - Old Wallpaper #219 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 32 times.
"Rose Church", by noildoof - Oldest version of Wallpaper #226 from pre-version 0.113, unlocked by visiting the Rose Church for the first time.
"Rose Church" - Old Wallpaper #226 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 10 times.
"First Blockade" - Old Wallpaper #227 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 26 times.
"Criss Cross" - Old Wallpaper #231 modified from versions 0.113-0.119e patch 5, unlocked after viewing at least two different endings (Except Glitch Ending and Ending #?).
"Third Blockage" - Old Wallpaper #234 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 28 times.
"Nightmare Wilderness" - Old version of Wallpaper #242, which was obtained by visiting the Sunrise Vista. Replaced after Ruri left the team.
"Shoal" - Old Wallpaper #243 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 5 times.
"Lord of the Well" - Old Wallpaper #245 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 18 times.
"Huge Ruins" - Old Wallpaper #247 modified from versions 0.113-0.119e patch 5, unlocked after sleeping 6 times.