Games like Mortisomem
Games like Mortisomem include Escape the Backrooms, Five Nights at Freddy's: Security Breach, Resident Evil Requiem, Poppy Playtime, and Five Nights at Freddy's: Secret of the Mimic. We matched them by the tags players give Mortisomem on Steam (Indie, Adventure, Horror, Action, and Retro): closest matches first, and among equally close ones the better-known games.

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

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

Resident Evil Requiem
Shared: Horror · Action · Survival Horror

Poppy Playtime
Shared: Horror · Indie · Psychological Horror

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Adventure · Action

Lethal Company
Shared: Horror · Survival Horror · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · Survival Horror

The Beast Inside
Shared: Adventure · Horror · Action

Darkwood
Shared: Horror · Adventure · Action

SILENT HILL: Townfall
Shared: Adventure · Horror · Action

Choo-Choo Charles
Shared: Horror · Survival Horror · Adventure

Inside the Backrooms
Shared: Horror · Adventure · Psychological Horror

Bendy and the Dark Revival
Shared: Horror · Action · Adventure

The Forest
Shared: Horror · Adventure · Action

Pacify
Shared: Horror · Psychological Horror · Survival Horror

Paper Dolls 2
Shared: Horror · Adventure · Psychological Horror

Ready or Not
Shared: Horror · FPS · Action

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

Nightmare of Decay
Shared: Horror · Action · Indie

The Outlast Trials
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil Village
Shared: Horror · Action · Survival Horror

Atomic Heart
Shared: Adventure · Action · Horror

Pyromaniac
Shared: Indie · Adventure · Action

SILENT HILL f
Shared: Horror · Psychological Horror · Action