Games like Metania
Games like Metania include Ready or Not, Escape the Backrooms, Resident Evil Requiem, MiSide, and Outlast. We matched them by the tags players give Metania on Steam (Psychological Horror, FPS, First-Person, 3D, and Indie): closest matches first, and among equally close ones the better-known games.

Ready or Not
Shared: FPS · Realistic · Psychological Horror

Escape the Backrooms
Shared: Psychological Horror · Horror · First-Person

Resident Evil Requiem
Shared: FPS · Horror · First-Person

MiSide
Shared: Psychological Horror · First-Person · Horror

Outlast
Shared: First-Person · Psychological Horror · Horror

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

Garten of Banban
Shared: Psychological Horror · First-Person · Horror

Buckshot Roulette
Shared: First-Person · Horror · Indie

Half-Life 2
Shared: FPS · Action · First-Person

The Beast Inside
Shared: First-Person · Horror · Psychological Horror

Resident Evil Village
Shared: First-Person · Horror · Action

How to Fish
Shared: Indie · First-Person · FPS

HOLE
Shared: FPS · Psychological Horror · Indie

Black Mesa
Shared: FPS · First-Person · Action

Zort
Shared: Psychological Horror · Horror · First-Person

Layers of Fear (2016)
Shared: Psychological Horror · Horror · First-Person

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · 3D

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Horror · Physics

Trepang2
Shared: FPS · Horror · First-Person

Dark Deception
Shared: Psychological Horror · Horror · First-Person

Metro Exodus
Shared: FPS · First-Person · Action

Resident Evil 7 Biohazard
Shared: First-Person · Horror · Psychological Horror

METRO 2033 Redux
Shared: FPS · Horror · First-Person

Backrooms: Escape Together
Shared: Psychological Horror · Horror · First-Person