Games like Superposition
Games like Superposition include SILENT HILL 2, MiSide, Escape the Backrooms, SILENT HILL f, and SOMA. We matched them by the tags players give Superposition on Steam (Casual, 3D, Psychological, Survival Horror, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

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

MiSide
Shared: Psychological Horror · Story Rich · 3D

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

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

SOMA
Shared: Psychological Horror · Survival Horror · Story Rich

Five Nights at Freddy's: Security Breach
Shared: Survival Horror · Singleplayer · 3D

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Singleplayer · Casual

No, I'm not a Human
Shared: Psychological Horror · Indie · Story Rich

Five Nights at Freddy's
Shared: Survival Horror · Psychological Horror · Singleplayer

Dead Space
Shared: Survival Horror · Psychological Horror · Horror

Buckshot Roulette
Shared: Psychological · 3D · Indie

Mouthwashing
Shared: Psychological Horror · Psychological · Story Rich

Resident Evil Requiem
Shared: Survival Horror · Horror · Singleplayer

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Indie · Story Rich

[Chillas Art] The Convenience Store
Shared: Casual · Psychological Horror · Indie

The Test
Shared: Psychological · Psychological Horror · Story Rich

Resident Evil 4
Shared: Survival Horror · Singleplayer · Horror

Resident Evil Village
Shared: Survival Horror · Singleplayer · Horror

Garten of Banban
Shared: Psychological Horror · 3D · Singleplayer

Hello Neighbor
Shared: Survival Horror · Story Rich · Horror

Poppy Playtime
Shared: Survival Horror · Singleplayer · Psychological Horror

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

The Callisto Protocol™
Shared: Survival Horror · Sci-fi · Horror

Chinese Parents
Shared: Casual · Psychological Horror · Indie