Games like outside the door
Games like outside the door include NEEDY STREAMER OVERLOAD, Milk outside a bag of milk outside a bag of milk, The NOexistenceN of you AND me, Milk inside a bag of milk inside a bag of milk, and The Test. We matched them by the tags players give outside the door on Steam (Visual Novel, Anime, Pixel Graphics, Psychological Horror, and Psychological): closest matches first, and among equally close ones the better-known games.

NEEDY STREAMER OVERLOAD
Shared: Anime · Visual Novel · Psychological Horror

Milk outside a bag of milk outside a bag of milk
Shared: Visual Novel · Psychological Horror · Pixel Graphics

The NOexistenceN of you AND me
Shared: Visual Novel · Anime · Psychological Horror

Milk inside a bag of milk inside a bag of milk
Shared: Visual Novel · Psychological Horror · Psychological

The Test
Shared: Pixel Graphics · Psychological Horror · Multiple Endings

Doki Doki Literature Club Plus!
Shared: Visual Novel · Anime · Psychological Horror

The Coffin of Andy and Leyley
Shared: Visual Novel · Psychological · Psychological Horror

Raging Loop
Shared: Visual Novel · Psychological Horror · Psychological

Mirror 2: Project X
Shared: Anime · Visual Novel · Female Protagonist

The Test: Hypothesis Rising
Shared: Visual Novel · Multiple Endings · Psychological Horror

Volcano Princess
Shared: Anime · Multiple Endings · Visual Novel

An alt girl for skoof
Shared: Visual Novel · Psychological Horror · Anime

q.u.q.
Shared: Visual Novel · Anime · Casual

Danganronpa V3: Killing Harmony
Shared: Visual Novel · Anime · Psychological Horror

Urban Myth Dissolution Center
Shared: Visual Novel · Pixel Graphics · Psychological Horror

Tales of the Black Forest
Shared: Pixel Graphics · Anime · Visual Novel

VA-11 Hall-A: Cyberpunk Bartender Action
Shared: Visual Novel · Pixel Graphics · Female Protagonist

Coffee Talk
Shared: Visual Novel · Pixel Graphics · Casual

Magical Girl Witch Trials
Shared: Visual Novel · Anime · Female Protagonist

Danganronpa: Trigger Happy Havoc
Shared: Visual Novel · Anime · Psychological Horror

STEINS;GATE
Shared: Visual Novel · Anime · Multiple Endings

No, I'm not a Human
Shared: Psychological Horror · Choices Matter · Multiple Endings

Zero Escape: The Nonary Games
Shared: Visual Novel · Anime · Psychological Horror

Until Then
Shared: Visual Novel · Pixel Graphics · Psychological