Games like Aijin
Games like Aijin include Five Nights at Freddy's: Security Breach, Poppy Playtime, OMORI, Little Nightmares II, and SILENT HILL 2. We matched them by the tags players give Aijin on Steam (Horror, Psychological Horror, Multiple Endings, Pixel Graphics, and Puzzle): closest matches first, and among equally close ones the better-known games.

Five Nights at Freddy's: Security Breach
Shared: Horror · Multiple Endings · Survival Horror

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

OMORI
Shared: Psychological Horror · Pixel Graphics · Multiple Endings

Little Nightmares II
Shared: Horror · Adventure · Puzzle

SILENT HILL 2
Shared: Horror · Psychological Horror · Survival Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

MiSide
Shared: Psychological Horror · Horror · Story Rich

Little Nightmares
Shared: Horror · Adventure · Puzzle

Mad Father
Shared: Horror · Psychological Horror · Pixel Graphics

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Horror · Pixel Graphics

SILENT HILL f
Shared: Horror · Psychological Horror · Survival Horror

Darkwood
Shared: Horror · Psychological Horror · Adventure

Tales of the Black Forest
Shared: Horror · Pixel Graphics · Adventure

Sally Face - Episode One
Shared: Psychological Horror · Horror · Puzzle

Inside the Backrooms
Shared: Horror · Psychological Horror · Puzzle

OneShot
Shared: Pixel Graphics · Puzzle · Story Rich

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

SOMA
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Psychological Horror

Milk outside a bag of milk outside a bag of milk
Shared: Psychological Horror · Pixel Graphics · Multiple Endings

Fran Bow
Shared: Psychological Horror · Horror · Puzzle

IMSCARED
Shared: Horror · Psychological Horror · Pixel Graphics

KinitoPET
Shared: Horror · Psychological Horror · Multiple Endings

The Evil Within 2
Shared: Horror · Psychological Horror · Survival Horror