Overdrive (オーバードライブ)/guide

Roller Skates
(You must have the weapon effects)

Kill the NPCs to earn 1000 G → go to the Town → Shoes Shop → interact with the shop keeper then interact with the present.

Laser Gun
Go to the Aquarium World → enter the Purple Gate → Purple World → interact with the white floating stone.

Maid
Go to the Ghostly World → enter the White Gate → Moss Passage → left, right, right, center, center, center, left, right → Brickwall World → Blue Door → Mansion → 2nd floor 4th door → interact with the stand with maid dress.

Detective
Go to the Ghostly World → enter the White Gate → Moss Passage → left, right, right, center, center, center, left, right → Brickwall World → interact with the shadow behind one of the brickwalls.

Spear
Go to the Snow World → interact with the red flower → Forest World → go up 3 rows and find a house → Doctor's Room → interact with the spear.

Crescent
Go to the Aquarium World → enter the Orange Gate → Cosmos World → top, right ,right, bottom → interact with the crescent moon.

Saxophone
Go to the Town → School → 2nd floor center door → interact with the saxophone.

Heart
Go to the Town → School → 3rd floor right door → interact with the Hell Block → Yellow Hell → enter the Building entrance → Laboratory Entrance → Laboratory Hallway → find the papers with number in the rooms → go to the bottom exit → enter the password (Hint: the shapes of the papers) → interact with the heart in the capsule.

Cyber
Go to the Town → School → 3rd floor right door → interact with the Hell Block → Yellow Hell → enter the Building entrance → Laboratory Entrance → Laboratory Hallway → room on bottom left → interact with the monitor → Cyber World → interact with the flashing block.

Robot
Go to the Ghostly World → interact with the gray gear → Gear World → enter the building → enter the door on the left → interact with the robot.

Paper
Go to the Snow World → step on the small lake → Under Water → walk between the white statues → enter the entrance on the left → interact with the glass bottle on the left.

Robin
Go to the Snow World → interact with the red flower → Forest World → go down 2 rows and interact with the withered tree → Withered Tree World → interact with the robin.

Shadow
Go to the Aquarium World → enter the Orange Gate → Cosmos World → top, bottom → interact with the black star → Chromatic World → climb down the hole → Red Cord World → wait until the place change → interact with the shadows that sit on the bench.

323's Endings Guide
After collected all concepts, the cage on the bottom of nexus will appear a glow that leads you to the Concept Room, drop all the concepts to the monitor.

End1

 * 1) Don't close the server located in the building of Gear World.
 * 2) Leave the room and go through the way to the exit.

End2

 * 1) Close the server located in the building of Gear World.
 * 2) Leave the room and go through the way to the exit.

End3

 * 1) Close the server located in the building of Gear World.
 * 2) Follow the Paper concept's guide then enter the entrance near the bottle to the Angel Place, use weapon to attack the angel for 5 times then interact the center to obtain the box key (if you have Detective effect you can find the hint).
 * 3) Back to the room and interact with the box beside the capsule to obtain the secret key.
 * 4) Leave the room and use it to the locked door then interact with the UFO.

Unlock 543
[Go to Cosmos World → top, bottom → interact with the black star → Chromatic World → enter the block entrance → Hospital → go to the right hallway → last room → interact the center to obtain the key (if you have Detective effect you can find the hint) → go to the left hallway → go to the end → enter the room → interact with 543. ]

After that, 323's room will appear a present box, interact with it will switch to play as 543.

Sheath Knife
Sleep on the dream bed repeatedly → Lucid Dream → interact with the sheath knife on the floor.

Pigeon
Go to the Flower Field → interact with the red flower → Forest World → go along the same row and find the pigeon.

Doctor
Go to the Purple Bridge World → enter the purple entrance → Sky World → interact with the Hell Block → Blue Hell → enter the Building Entrance → Hospital → go to the right hallway → first room → interact with the shadow NPC that wears doctor coat.

Virus
Go to the Purple Bridge World → enter the purple entrance → Sky World → interact with the Hell Block → Blue Hell → enter the Building Entrance → Hospital → go to the right hallway → second room → interact with the monitor → Cyber World → interact with the purple color virus.

Margaret
Go to the Flower Field → go between the flowers → interact with the white flower.

Dustbox
Go to the Purple Bridge World → enter the brown entrance → Town → interact with the rubbish bin.

Handgun
(You must have the weapon effect)

Kill the NPCs to earn 1500 G → go to the Purple Bridge World → enter the brown entrance → Town → enter the building → interact with the shadow that wears sunglasses.

Helicopter
(You must have the Pigeon concept)

Go to the Purple Bridge World → enter the brown entrance → Town → enter the building → go left to the staircases → go to the top of the Rooftop → equip Pigeon concept and fly over the fence to another rooftop → interact with the helicopter.

Cardigan
Go to the Christmas World → go between the present boxes → Present World → enter the present with door → interact the cardigan on the stand.