Games like Dark DieMansion
Games like Dark DieMansion include Outlast, Poppy Playtime, Outlast 2, Resident Evil 7 Biohazard, and Resident Evil Village. We matched them by the tags players give Dark DieMansion on Steam (Horror, Survival Horror, Action, First-Person, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · First-Person

Poppy Playtime
Shared: Horror · Singleplayer · Survival Horror

Outlast 2
Shared: Horror · Survival Horror · First-Person

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

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

Darkwood
Shared: Horror · Survival Horror · Action

The Forest
Shared: Horror · Survival Horror · First-Person

Ultimate Custom Night
Shared: Horror · Survival Horror · Singleplayer

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

Resident Evil Requiem
Shared: Survival Horror · Horror · Action

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

SOMA
Shared: Horror · Psychological Horror · Survival Horror

Five Nights at Freddy's 4
Shared: Horror · Survival Horror · First-Person

Bendy and the Dark Revival
Shared: Horror · Action · First-Person

Resident Evil 4
Shared: Horror · Survival Horror · Action

Five Nights at Freddy's 2
Shared: Horror · Survival Horror · Singleplayer

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

The Outlast Trials
Shared: Horror · Survival Horror · First-Person

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

Slender: The Arrival
Shared: Horror · Survival Horror · First-Person

Lethal Company
Shared: Horror · First-Person · Survival Horror

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

FIVE NIGHTS AT FREDDY'S: HELP WANTED
Shared: Horror · Survival Horror · Singleplayer

Alien: Isolation
Shared: Horror · Survival Horror · First-Person