Yume 2kki:Wallpapers: Difference between revisions

Revision as of 03:31, 16 November 2020

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 268 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.

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

#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" - After sleeping 3 times.
#4 - "Blue Passage" - When you enter The Hand Hub for the first time.
#5 - "Buddha" - When you activate the Buddha Rave event in Marijuana Goddess World.
#6 - "Dot Urotsuki" - After collecting at least 4 effects.
#7 - "OG3 Dance" - When you interact with the painting of the same image in the Art Gallery.
#8 - "The Mysterious World" - When you interact with the painting of the same image in the Art Gallery.
#9 - "heart256" - After looking at the fourth book from Urotsuki's left on the second bookcase in the Library.
#10 - "Remote Island Sisters" - After interacting with Desu-chan and Onee-chan, then visiting the Lower Highway.
#11 - "2." - After getting 9 effects (including the Instructions).
#12 - "Crocodile Dog" - After going to the "Green Monster Party" in Garden World.
#13 - "Fairytale 11" - When you enter Theatre World for the first time.
#14 - "Alley" - When you enter Japan Town for the first time.
#15 - "Rainbow" - After getting the Rainbow effect.
#16 - "Japanese Urotsuki" - After sleeping 10 times.
#17 - "Master" - When you enter the Underground Bar in Japan Town for the first time.
#18 - "Sky With A Rainbow" - When you use the Rainbow effect at the Snowy Pipe Organ.
#19 - "TV Rodeo" - When you enter the room with the purple wavy lines on the floor at the Underwater Amusement Park for the first time.
#20 - "Dancer" - When triggering Odorika's full screen dance event.
#21 - "Effects Festival" - When you collect at least 10 effects.
#22 - "Provost" - When encountering the Commando and Provost-san when the submarine is not open.
#23 - "Childbirth" - After encountering Mother in Urotsuki's Dream Apartments.
#24 - "Scars" - When you interact with the giant mannequin in Nail World.
#25 - "Signs" - When you enter Sign World for the first time.
#26 - “Space” - After chainsawing Tapir-San's back to get into Space.
#27 - "White Twintails" - After getting the Twintails effect.
#28 - "Octopus Man" - After using the Fairy effect on Tako Otoko.
#29 - "Painter" - After entering the first painting you see in the Art Gallery after going through the easel.
#30 - "Giant Squid" - When you enter the Reef of Atlantis for the first time.
#31 - "Order" - When you swim down the road leading to the Underwater Amusement Park.
#32 - "Aojiru" - After interacting with Aojiru.
#33 - "Boy 1" - After getting the Boy effect.
#34 - "Comic Urotsuki" - After getting at least 14 effects.
#35 - "Gakuran" - After getting the School Boy effect.
#36 - "Spring" - After getting the Spring effect.
#37 - "TV" - When you enter Urotsuki's Dream Apartments and turn on the TV.
#38 - "Heart" - After entering Valentine Land from Sign World.
#39 - "Chocolate" - When you enter Chocolate World for the first time.
#40 - "Park" - After chainsawing the sane Shadow Woman in Forest World, going underground and then emerging.
#41 - “Doppelganger” - When using the Glasses effect on the nighttime ledge in Day & Night Towers.
#42 - “Headless Woman” - When you interact with the Music Box Woman found in Nail World.
#43 - "Director's Daughter" - After interacting with Oni Musume and reading every book in the Library.
#44 - "Even Without Support" - When you interact with the painting of the same image in the Art Gallery.
#45 - “Hourglass Desert” - When you enter the Hourglass Desert for the first time.
#46 - “Confinement” - After getting the event inside the Dungeon in the Underwater Amusement Park.
#47 - “Those Who Wait” - After encountering the Boy on the Bench in the Blue Forest.
#48 - “Twins” - After interacting with the Beret Twins.
#49 - “inu 1” - When you enter Teddy Bear Land for the first time.
#50 - “Megusuri & Hako-ko” - After interacting with Megusuri Uri in the Eyeball Shop.
#51 - "Itetsuki" - After trying on the winter gear in the Dressing Room (You must have completed the Plated Snow Country minigame).
#52 - “Sweets” - After using the Cake effect on Sweets Musume.
#53 - “Musician & Cat” - After meeting Elvis Masada.
#54 - “Cake-chan” - After getting the Cake effect.
#55 - “Zerisan” - After getting 20 effects (including the Instructions).
#56 - “Mini Game (↑V↑)” - After completing the ↑V↑ minigame.
#57 - “Incubation” - After coming across the creatures in tanks at the Power Plant.
#58 - "Silhouette" - When you enter the Monochrome Street for the first time.
#59 - "Uboa" - When encountering Dogboa.
#60 - "UFO" - After getting abducted from the Apartments.
#61 - "Fox" - After interacting with Yukata in The Invisible Maze.
#62 - "Mars" - After interacting with the Blue Crying Man during the Zalgo event.
#63 - "Twintails & Black Telephone" - After getting the Twintails effect.
#64 - "Reading Theatre" - When using the Telephone effect on Oni Musume while she is reading.
#65 - "Sweets Musume" - After using the Cake effect on Sweets Musume.
#66 - "Don't Watch" - When you climb up the ladder to Tapir-San's Place.
#67 - "Present/Past" - After viewing the Lonely Urotsuki event in the Underwater Amusement Park and obtaining Stretch and Child effects.
#68 - "Dreams & Reality" - After sleeping 30 times.
#69 - "My Real Studies" - After activating the cloning machine in Red Brick Maze.
#70 - "Killing Mirror in a Dream" - After chainsawing your "reflection" in a room in Day & Night Towers.
#71 - "Monmons" - After interacting with the Monmons in Marijuana Goddess World at least 6 times in one visit.
#72 - "Friend" - After getting attacked by the insane Shadow Woman in the Floating Red Tiles World.
#73 - "Twintails Maid" - After combining the Twintails effect with the maid outfit in the Dressing Room.
#74 - "Turn of the Month" - When you use the Glasses effect during the Lonely Urotsuki event*.
#75 - "Glasses Suit" - After combining the Glasses effect with the suit in the Dressing Room.
#76 - “Do Not Disturb” - After getting the Wolf effect.
#77 - “Sun & Woman” - After trying to chainsaw the lady under the big red sun in the Pastel Blue House.
#78 - "Mushroom" - After you enter Mushroom World for the first time.
#79 - “Hanging Child” - When coming across Koshukei-tan in the Graffiti Maze.
#80 - “Detour Around My Face” - After walking near your ghost in the Reef of Atlantis.
#81 - "Monster" - After eating the cheese that turns you giant in Toy World and crushing a certain amount of buildings in Mini-Town.
#82 - "Watering" - After interacting with the Farmer in Farm World.
#83 - "Howling At The Moon" - When using the Wolf effect to howl at the moon on the nighttime ledge in Day & Night Towers.
#84 - "Not & Marginal" - After reading the first book on Urotsuki's left on the first bookcase in the Library.
#85 - "Do You Also" - After interacting with Oni Musume while she's reading.
#86 - "★Penguin★" - After getting the Penguin effect.
#87 - "My World" - When you enter The Nexus for the first time.
#88 - "Director" - After interacting with Yume in Tapir-San's Place.
#89 - "bonsoir, mon reve" - After visiting all the landmarks on this wallpaper (Check Below).
#90 - "Dreams・Dreams・Dreams" - After getting the Child effect.
#91 - "B-Kun Excretion Festival" - After using the Boy effect in the Bathroom in the Dark Room.
#92 - "Box Child" - When finding Hakoko in the box in the Eyeball Shop.
#93 - "Dokokano Night B" - After laying in Urotsuki's bed in the dreamworld.
#94 - "TP Child Alone" - When you use the Child effect before viewing the Lonely Urotsuki event at the Underwater Amusement Park.
#95 - "Why? BOKN Cliff" - When you chainsaw the girl at the Outlook in The Invisible Maze.
#96 - "They're Scraped" - When you look at the fifth book from Urotsuki's right on the first bookcase in the Library.
#97 - "20" - Multiple interactions (see below).
#98 - "Me Without Color" - After obtaining at least 20 effects.
#99 - "Maiko" - After getting the Maiko effect.
#100 - "Full Smile!!" - After visiting Smile-san and making him laugh.
#101 - "Crying/Laughing" - After chainsawing the crying white creature in Blood World.
#102 - "Hat" - After meeting the lady underneath the big red sun in the Pastel Blue House.
#103 - "Drunk" - When you buy one or more drinks at the Underground Bar.
#104 - "Where You Are Staring" - When encountering a sane Shadow Woman on Day & Night Towers or Toy World.
#105 - "Fall" - After falling down from completing the Penguin GB Game in Urotsuki's Dream Apartments.
#106 - "Red Book" - After interacting with Oni Musume for the first time.
#107 - "Submerged Underwater" - When using the Child or Stretch effect near the puppet theatre on the Ocean Floor.
#108 - "Chainsaw" - After getting the Chainsaw effect.
#109 - "Circus Tent" - After finding the albino girl in the tent at The Circus and escaping without the clown trapping you.
#110 - "Plaster Cast" - After getting the Cripple effect.
#111 - "Sink" - When you reach the Ocean Floor for the first time.
#112 - "How Is This In My Room?" - After encountering the long-haired girl in Urotsuki's Dream Apartments.
#113 - "dream" - After sleeping 35 times.
#114 - "! TP Human Sacrifice" - After Urotsuki gets crushed under one of the pillars in the Underwater Amusement Park.
#115 - "I Will Not Come Back, Box Child" - When using the Bug or Fairy effect to make Hakoko pop her head out.
#116 - "Urotsuki" - When you have at least 22 effects (counting the Instructions).
#117 - "Without Zero" - When encountering the XY twins in the Apartments.
#118 - "Bonk!" - After getting the Child effect.
#119 - "You Can't, Red" - After getting the Red Riding Hood effect.
#120 - "Devas' Confinement" - After getting caught by all the Chasers on this wallpaper. This can be easily accomplished in Onyx Tile World.
#121 - "Black Witch Invisibility" - 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" - When encountering the Commando and Provost-san.
#123 - "Whoa! Dazzling" - When you enter the room with the silhouette on the ground in the Pastel Blue House.
#124 - "Papa T" - When you interact with the Blue NPC in the Arrow Maze.
#125 - When you enter the Broken Faces Area for the first time.
#126 - "Tissue" - After getting the Tissue effect.
#127 - "Red Love" - After getting the Chainsaw effect and sleeping at least 13 times.
#128 - "Amentia" - After getting 22 effects.
#129 - "Urotsuki Covered in Blood" - After Urotsuki gets crushed under one of the pillars at the Underwater Amusement Park.
#130 - "Tatami Room Loneliness"" When you visit the Tatami Room for the first time.
#131 - "A Chainsaw" - After getting the Chainsaw effect.
#132 - "In the Water Tank" - After visiting the Power Plant and falling into one of the tanks.
#133 - "Residents of the Dream World" - After meeting all the characters on this wallpaper (see below).
#134 - "Amusement Park Loneliness" - After viewing the Lonely Urotsuki event in the Underwater Amusement Park and obtaining the Child effect.
#135 - "Little Red Riding Hood" - After getting the Red Riding Hood effect.
#136 - "Prince & Princess" - After encountering the prince and princess cutouts in Theatre World.
#137 - "Shrine" - When you enter the Shinto Shrine for the first time.
#138 - "Bathhouse Scene" - When you enter the Bathhouse for the first time.
#139 - "Everyone's Dream" - After viewing the first Ending.
#140 - "Dolphin Puzzle" - After solving at least one Kura Puzzle.
#141 - "Flesh & Blood Babies" - When you fully explore Closet Pinwheel Path (This does not include the isolated section.)
#142 - After playing for 30 minutes (not including time the menu is open).
#143 - "Fiction & Reality" - After seeing the monochrome boy change to red on the Namakubi Path in the Shinto Shrine.
#144 - "I Dreamed of the Universe." - When you enter Flying Fish World for the first time.
#145 - "Sneering Shadow img" - When you use the Telephone effect on Smile-San in Flying Fish World.
#146 - "Rainbow Bridge" - When you use the Teru Teru Bōzu and Rainbow effects to make a bridge at the Tribe Settlement.
#147 - "Those Who Lurk Underground" - When you reach the Underground TV Complex for the first time.
#148 - "Soldier" - When you go near the room with the army NPCs in the FC Basement.
#149 - "Momentary Break" - After you change into the swimsuit at the hotel in Japan Town.
#150 - "Starting the Pulse" - When you use the Lantern effect in Heart World.
#151 - "DimensionWorld" - After seeing every minor event in Flying Fish World (see below).
#152 - "Haniwa" - After you view the Haniwa Dance event at the Haniwa Temple.
#153 - "Egg" - After visiting 95% (or more) of the accessible maps in the game.
#154 - "What Do You See?" - 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" - After going down a ladder in a room in the Forest Carnival.
#156 - "Toy Box" - 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" - After getting the Fairy effect.
#158 - "Beginning From The End - After catching the underwater bus from the Trench Overlook in Atlantis.
#159 - "Her Favorite Things" - After either interacting with Shimofuri-tan or using the Cake effect near her in Cutlery World.
#160 - "Old Split Retro" - When using the Telephone Effect in the TV room in Flying Fish World.
#161 - "OS Three Sisters" - After using the Trombone effect on all the platforms where the colorful faires are stepping on in the Binary World.
#162 - "Never-ending Dream" - After viewing Endings #1-4.
#163 - "That Eyeball" - After sitting next to the gray NPC in the path that connects the Gray Road to Grass World.
#164 - "Moon Lake" - When visiting the Mermaid Moon Lake in Jigsaw Puzzle World.
#165 - "Michael"- After fully completing the High Priestess Event in the Forest Carnival.
#166 - "Like Onsen-san" - After sleeping 20 times.
#167 - "True Identity" - After looking at the Angel NPC using the Glasses effect in Fountain World.
#168 - "Welcome" - When you enter Fabric World for the first time.
#169 - "In the sea, In a Dream" - When entering the Flooded Baths from the bottom of the Reef of Atlantis.
#170 - "Air Bubbles" - After sleeping 34 times.
#171 - "Into the Deep" - 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" - When you enter Green Neon World for the first time.
#173 - "Angel" - After interacting with the piano in the left room of the Fountain House in Fountain World.
#174 - "Boat Trip" - After sleeping 16 times.
#175 - "Radio-kun" - When interacting with the Alley Robot in the Dark Alleys
#176 - "Red Spider Lily" - When turning the Red Lily Lake upside down.
#177 - "Vomiting Melon" - 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" - After turning invisible in the Danger Panic Zone.
#180 - "Dream Figure Folding Screen" - When you enter Mosenite.
#181 - "Bright!" - After sleeping 30 times.
#182 - "U's Room" - When you use the Glasses effect in front of Seishonen.
#183 - "At The Bottom Of The Water" - When first entering Huyure-chan's area.
#184 - "Whale Meets Girl" - When you find the Ark in the Scorched Wasteland.
#185 - "A Gentle Light" - After using the Lantern effect on the white NPC in Neon Candle World.
#186 - "White Sand Beach and Wolf Boy" - After getting the Wolf effect.
#187 - "Jellyfish Aquarium" - After sleeping 22 times.
#188 - "I Found It" - When entering Constellation World for the first time.
#189 - "I Wonder If They Will Come Again" - After interacting with the shop keeper in Japan Town, or upon entering The Hand Hub for the first time.
#190 - "The Sea is Wide" - When you go to the Realistic Beach.
#191 - "Torch" - When you get the Lantern Effect.
#192 - "Just Fit!" - After getting the Drum effect.
#193 - "Incomplete" - After sleeping 24 times.
#194 - "Secrecy" - When entering the Polluted Swamp.
#195 - "Unbearable..." When using either the Penguin or the Wolf effects on the sea sponge found in the Reef.
#196 - "Chartered Pig Farm" - When you first enter the Mutant Pig Farm.
#197 - "Guardian Of The Forest" - After sleeping 4 times.
#198 - "Courtyard" - After sleeping 12 times.
#199 - "Dark Road" - After sleeping 8 times.
#200 - "Black Cave" - Seeing the Dream of Roses event in Red Rock Caves
#201 - "Book Within a Dream, Dream Within a Book" - When you find the same sculpture in the Eyeball Archives.
#202 - "Report Of A Certain Capture Experiment" After completing the Hallucination event.
#203 - "All Living Things Must Perish" - Look up inside the building on the island in Polluted Swamp
#204 - "Prologue" - After sleeping 2 times.
#205 - "Lonely" After sleeping 14 times.
#206 - "At The Marquis' Mansion" - After exploring the Monkey Mansion.
#207 - "Cyber" - After entering the Cyber Maze for the first time.
#208 - "Always Watching" - After passing throught The Back Alley
#209 - "Lord of 20.180" - After seeing the Sea Monster in the Neon Sea.
#210 - "End of the Festival" - After seeing the "Honoring the Dead" event in Dream Mexico.
#211 - "Sepia Toned Water's Surface" - After entering Sepia Clouds World for the first time.
#212 - "Urotsuki and the Monochrome Castle" - After equipping the Gakuran effect near Gakuran.
#213 - "Moai" - After interacting with the Moai Bro in the Sea of Clouds.
#214 - "I'm Booored" - After encountering the Cyborg girl in Tesla Garden.
#215 - "Underwater Bench" - After sitting on the bench in The Trench Overlook.
#216 - "Newborn Leaves" - After entering Grass World for the first time.
#217 - "Meeting" - After seeing Hakoko and Megusuri Uri in the same room.
#218 - "From the Graveyard to the Cradle" - After visiting some areas in the Hospital and Graveyard World (see below).
#219 - "bottomless" - After sleeping 32 times.
#220 - "Empty Footsteps" - After getting the Bike effect and the Wolf effect.
#221 - "Don't Come Near" - After getting the Wolf effect.
#222 - "EYE I EYE" - After interacting with all the NPCs in the picture (see below).
#223 - "False Shoal" - After entering False Shoal for the first time.
#224 - "The Light and Dark of the House in the Shoal" - After pressing the switch in Marina's House.
#225 - "Resident of the Dream Island" - After entering the Titan's Pier.
#226 - "Rose Church" - After sleeping 10 times.
#227 - "First Blockade" - After sleeping 26 times.
#228 - "Surrounded by Lotus Underwater" - After seeing the chairs and tables in Lotus Waters.
#229 - "Stop Right There!" - After getting the Crossing effect.
#230 - "The Things that Create Me" - After viewing Ending #1.
#231 - "Criss Cross" - After viewing at least two different endings (Except Glitch Ending and Ending #?).
#232 - "Reflecting Water" - After lighting the lotus tree in Cloudy World with the Lantern effect.
#233 - "Into the Dream" - After getting the Eyeball Bomb effect.
#234 - "Third Blockage" - After sleeping 28 times.
#235 - "Wastebasket" - After visiting the main areas of the Riverside Waste Facility and the interiors.
#236 - "Awakening in the Cave" - After entering the Snowy Forest for the first time.
#237 - "Strawberries" - After entering the main area of Cotton Candy Haven for the first time.
#238 - "Two Worlds" - 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" - After sleeping 20 times.
#240 - "Candy" - After entering the Candy Cane Fields for the first time.
#241 - "Octopus Man" - After using the Fairy effect on Tako Otoko.
#242 - "Pyramids" - After entering the Stellar Mausoleum for the first time.
#243 - "Shoal" - After entering the Hidden Shoal for the first time (Currently unobtainable).
#244 - "Ceiling" - After entering The Ceiling for the first time.
#245 - "Lord of the Well" - After sleeping 18 times.
#246 - "nAmElEsS sPiRiT" - After entering CMYK Tiles World for the first time.
#247 - "Huge Ruins" - After sleeping 6 times.
#248 - "Star Path" - After entering Star Building for the first time.
#249 - "Metaro!" - After entering Ronsutoka's Room in the Silent Sewers for the first time.
#250 - "Looking in the Mirror" - After using the Glasses effect in the Mirror Room.
#251 - "Space Swimming" - After entering Flying Fish World for the first time.
#252 - "Like a Lullaby" - After entering the Magnet Room for the first time.
#253 - "Juice" - After buying from Vending Machines 15 times and having at least 15 hearts.
#254 - "Secret Base in the Attic" - After interacting with the telescope in the attic of the Infinite Library and it doesn't show only white.
#255 - "Life's Relaxation" - 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" - After entering the Dark Warehouse for the first time.
#257 - "Bodhisattva" - After interacting with the Buddha statue in the Museum with the Glasses effect equipped.
#258 - "Hidden Room 1" - After entering the hidden room in Rough Ash World for the first time.
#259 - "Hidden Room 2" - After entering the hidden room in Green Neon World for the first time.
#260 - "Hidden Room 3" - After entering the hidden room in Flying Fish World for the first time.
#261 - "Water Labyrinth" - After entering the Flooded Dungeon for the first time.
#262 - "NineTiles" - After entering the Rainbow Tiles Maze for the first time.
#263 - "Ancient Crypt" - After entering the Ancient Crypt for the first time.
#264 - "Stacking ash on Riverside Waste Facility" - After seeing the Snowy Path in Riverside Waste Facility.
#265 - "Gather in the Light" - After entering the Celestial Garden for the first time.
#266 - "Flowers and Fairies" - After entering the Fairy's cave for the first time.
#267 - "Under the Night Sky" - After entering the Cocktail Lounge for the first time.
#268 - "Listen to the Darkness" - After getting caught by the Shadow Lady in the Dark Warehouse.

Specifications

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 & 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)
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.

Removed or modified wallpapers

"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, unlocked after interacting with Onsen-San in Pillars World.
"Air Bubbles" - Old Wallpaper #170, unlocked by activating the Drowning Event in the Depths
"Boat Trip" - Old Wallpaper #174, unlocked after riding the boats in the Abandoned Apartments.
"Red Spider Lily" - Old version of wallpaper #176.
"Bright!" - Old wallpaper #181, unlocked by visiting the Cosmic World for the first time.
"Jellyfish Aquarium" - Old wallpaper #187, unlocked by entering the aquarium in Overgrown City
"Torch" - Old version of wallpaper #191.
"Incomplete" - Oldest version of wallpaper #193. Replaced at request of the author.
"Incomplete" - Old Wallpaper #193, unlocked by encountering the giant ball of scrap iron in Overgrown City.
"Guardian Of The Forest" - Old Wallpaper #197, unlocked after chainsawing the guardian in the Forest Pier
"Courtyard" - Old Wallpaper #198, unlocked after visiting the secret garden in the Deserted Town.
"Dark Road" - Old Wallpaper #199, unlocked after chainsawing both the male and the female NPCS that are sitting under a wooden structure in Tulip Lamp World.
"Prologue" - Old Wallpaper 204, unlocked after entering the Forest Pier from the Cog Maze.
"Lonely" Old wallpaper #205, unlocked after encountering the shadow figure sitting on a bench in the Deserted Town
"bottomless" - Old Wallpaper #219, unlocked by activating the Drowning Event in the Depths.
"Rose Church" - Old Wallpaper #226, unlocked by visiting the Rose Church for the first time.
"First Blockade" - Old wallpaper #227, unlocked after entering the Transmission Tower World for the first time.
"Third Blockage" - Old wallpaper #234, unlocked by entering Old Train Station B from the Mirror Room.
"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, unlocked after entering the Hidden Shoal for the first time.
"Lord of the Well" - Old Wallpaper #245, unlocked by meeting the creature in the well in the Abandoned Apartments.
"Huge Ruins" - Old WP #247, Unlocked by entering the Radiant Ruins for the first time.

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 * 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 that takes you to [[Atlantis]].
+* 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]]