43 - BALLOON (Backrooms)

17 - BASEMENT (Backrooms: fault - false wall)

14003 - CLASSROOM (Mall: gate - gumball machine)

444 - TRICK (Mall: gate - weird door)

729 - CLOCKS (Mall: gate - empty food store)

82- HILLS (Play Area: pipe corridor)

17902 - PARKING LOT (Play Area: play tubes)

943 - PHONOGRAPH (Pool room)

862 - FEAR (Pool room)

989 - DARK (Pool room: scary forest)

0 - TRUE ENDING??? (End room: password - hotel door number)

Edit: the password isn't written as numbers, but as words; for example its not something like 123, but instead onetwothree. Hope that help.

Edit: You don't need to replay the whole game to get every ending, instead you can Alt F4 after receiving each ending achievement and after restarting get sent back to the last room you were in

Backrooms:
Concrete Hallway
House/Children room
rights side of concrete hallway there is light illuminated by the cross, underneath are some concrete pillars you can jump on, under pillars is a door that leads to playroom


Mall:
Museum + additional rooms within museum
Angelic Room
Weird Door
within the weird door is Turkey Quest

Playroom:
Hotel with grassy area
Round Hotel + plane
Floral Door + maze (bring flashlight)
Sun Door
right side of hallway leading to door is a pit that leads to the vintage backrooms achievement

Pool Room:
Truman Show Ending
Scary Forest


The End:
Computer:
Password: Hotel door number
The: End?