| Game | Walkthrough | Gallery | Theories |
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| Spoiler warning: Plot or ending details follow. |
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Complete guide for Yume Nikki 3D (Version 0.02.1).
Flowchart
Flow chart for Yume Nikki 3D (Version 0.02), created by an anonymous Uboachan user with area names by LiquidTc (Source).
Effects
Bicycle
Appearance: Madotsuki rides on a bicycle.
Passive Effect: Madotsuki's movement speed increases.
Action: (Shift) Madotsuki rings the bell on the bike.
Location: Found in the Ghost Town.
Practical Uses: Used to travel through the dream world faster.
Enter the grey and brown door to the Ghost Town. Go up to the crossroads and take the right path. When you reach the second crossroads, go left and interact with the bike.
Monochrome
Appearance: Madotsuki becomes monochrome.
Passive Effect: None.
Action: (Shift) Madotsuki teleports to the room where the effect is obtained.
Location: Found at the Monochrome Eye.
Practical Uses: Used to quickly return to the Monochrome Eye.
(The route to this effect contains flashing images)
Enter the white door to the Abstract World. Follow the white path in front of you until you reach a black platform with a white ghost on it. Take the east path (right of the ghost) and go through the door at the end. Go across the chessboard and through the door. Make your way across the platforms and go through the door at the end. Interact with the blinking eye.
8-bit
Appearance: Madotsuki becomes 8-bit.
Passive Effect: Madotsuki makes 8-bit-like noises as she walks/jumps.
Action: (Shift) Madotsuki makes a noise.
Location: Found in FC Dungeon B.
Practical Uses: None.
Enter the plain brown door to FC Dungeon A. Cross the bridge then turn right to reach a purple building. Go left and through a mini-tunnel that leads behind the purple building. Keep going forward and cross the bridge on the other side to reach a blue stone wall. Go between the gap in the wall, go around the left hand corner then through the archway into a purple hallway. Go down the hallway, head up the stairs at the end then enter the brown door at the top.
You'll now be in the FC Overworld. Go left and interact with the hole surrounded by brown bricks to enter FC Dungeon B. Go round the corner and interact with the stairs/hole. At the split path, take the left hand path and go down the stairs. Go down the stairs on the other side of the hall. Turn the corner and interact with the NPC.
Blindfold
Appearance: Madotsuki wears a blindfold.
Passive Effect: The screen turns black, preventing the player from seeing anything.
Action: (Shift) Madotsuki sits down.
Location: Found in the Pulsing Cave.
Practical Uses: None.
Enter the brown and silver door to Ghost Town. Head up to the first crossroad and go down the road on your right. When you reach a second crossroad, take the path to your right again. At the split in the road, go right once more and enter the door to reach Snow World.
In Snow World, go forward and step on the sparkles between some icicles to reach Glass World. Go up then go right to reach a room with a doorway. Entering the doorway will take you to the Barrack Prison. Go up to the next room then go left into a room full of priori. Enter the room to your left then go right then up. Step into the flame square to reach Hell.
In Hell, make your way to the bottom (get Key 1 on the way). Step into the flame square at the bottom of this area. You'll be sent to the Dense Woods. Go forward and follow the dirt path until it splits in two directions. Take the path on the left and go under the wooden archway to where a drooling ghost is. Go left from the drooling ghost and enter the cave. Interact with the wisp.
Palette
Appearance: Madotsuki has a painter's palette floating above her head.
Passive Effect: None.
Action: (Shift) Certain objects in the dream world will change color.
Location: Found outside Poniko's House.
Practical Uses: Changes the appearance of certain objects.
(Knife effect is required. The route to this effect contains flashing/strobing images.)
Enter the white door to the Abstract World. Follow the white path in front of you until you reach a black platform with a white ghost on it. Take the north path (behind the ghost) and go through the door at the end to the Piano Room. Head to the other side of the piano room to a huge piano key platform with some NPCs standing on it.
You should see three humanoid NPCs blocking a flashing doorway. Use the knife on the NPCs and go through the doorway. In Strobe World, get off the platform and head east. Go behind a striped flashing wall and step on a flashing circle in the middle of some gold spikes. In the Number Path, go left and interact with the red balloon. You'll arrive at Poniko's House. Go up the steps of the mini-waterfall and interact with the palette.
Knife
Appearance: Madotsuki holds a knife.
Passive Effect: None.
Action: (Shift) When interacting with a NPC, Madotsuki will stab them.
Location: Found in the Eye World.
Practical Uses: Used to kill NPCs.
Enter the silver door to Eye World. Turn around and go north-west from the door and follow the red brick path around a corner. Interact with the knife at the end of the path.
Keys
Keys can be obtained in any order
Key 1
Enter the brown and silver door to Ghost Town. Head up to the first crossroad and go down the road on your right. When you reach a second crossroad, take the path to your right again. At the split in the road, go right once more and enter the door to reach Snow World.
In Snow World, go forward and step on the sparkles between some icicles to reach Glass World. Go up then go right to reach a room with a doorway. Entering the doorway will take you to the Barrack Prison. Go up to the next room then go left into a room full of priori. Enter the room to your left then go right then up. Enter the flame circle to reach Hell. In Hell, make your way downwards. The second rocket platform has a metal walkway on the side with the key on it. Interact with the key.
Key 2
Enter the silver door to Eye World. Go north-east (diagonally to your upper-right) from the door and between the pink pillars. Step onto the teleporter on the other side of the Neon Tile Path. In the Fountain Hall, go up to the blue fountain then go right to the yellow fountain. Enter the door to your right. Go north in the Amoeba Room and enter the doorway to reach The Hospital.
In The Hospital, enter the doorway to your upper-right. Go around the corner and enter the next doorway. Go left and enter the doorway. Enter the doorway to your right. Go around the corner and enter the doorway in front of you. Go right and enter the doorway on the opposite wall. You should reach a room with a single bed. Go left and jump onto the blocks to get onto the bed. Interact with the key on the bedsheets.
Key 3
(The path to this event contains flashing images.)
Enter the plain brown door to FC Dungeon A. Cross the bridge then turn right to reach a purple building. Go left and through a mini-tunnel that leads behind the purple building. Keep going forward and cross the bridge on the other side to reach a blue stone wall. Go between the gap in the wall, go around the left hand corner then through the archway into a purple hallway. Go down the hallway, head up the stairs at the end then enter the brown door at the top.
You'll now be in the FC Overworld. Head up to the island on your right and interact with the NPC to reach the Old Cathedral. Wander around and look for a hole with smoke coming out of it at one of the dead ends. Interact with the smoke to reach Sign World. Make your way across the mini-maze to the other side and enter the brown door to The Manor A. In The Manor, go down the hallway on your right. On the other side of the hall, turn right then turn left and the branching paths. Turn the corner and you should see a doorway near the middle of the room.
Entering the doorway will bring you to the gravity room. Jump onto the platforms and make your way to the top. There's a doorway you can jump to on the right of the very last platform. Jump to the doorway and go inside. Interact with the key on the ground.
Events
Uboa Event
(Knife effect is required. The path to this event contains flashing images.)
Enter the white door to the Abstract World. Follow the white path in front of you until you reach a black platform with a white ghost on it. Take the north path (behind the ghost) and go through the door at the end to the Piano Room. Head to the other side of the piano room to a huge piano key platform with some NPCs standing on it.
You should see three humanoid NPCs blocking a flashing doorway. Use the knife on the NPCs and go through the doorway. In Strobe World, get off the platform and head east. Go behind a striped flashing wall and step on a flashing circle in the middle of some gold spikes. In the Number Path, go left and interact with the red balloon to arrive at Poniko's house. If you enter Poniko's room and turn off the light, there's a small chance that the room will change and Uboa will appear. Interacting with Uboa will warp you to an inescapable area.
Mars Crash
Enter the white block door to Masada's Spaceship. Enter the doorway on the left. Go to the other side of the piano room and enter the doorway. Sleep in the bed. Wait a bit then press E to get out of the bed. Go back to the first room. A cutscene will play and you'll wake up in Masada's piano room. You can now exit the spaceship to Mars.
Ghost Madotsuki
(Knife effect is required. The path to this event contains flashing images.)
Enter the white door to the Abstract World. Follow the white path in front of you until you reach a black platform with a white ghost on it. Take the north path (behind the ghost) and go through the door at the end to the Piano Room. Head to the other side of the piano room to a huge piano key platform with some NPCs standing on it.
You should see three humanoid NPCs blocking a flashing doorway. Use the knife on the NPCs and go through the doorway. In Strobe World, get off the platform and head east. If you wander around the Strobe World, you may find Madotsuki's ghost wandering around.
Ending
Collect all the keys and effects. Go to the Nexus and enter the door with the semi-circle design on it. Go up and enter the doorway. Place the keys into the keyholes to unlock the path behind them. Enter the now unblocked doorway. Go right and interact with the end of the path to view the ending.