Games like White Mask Mansion
Games like White Mask Mansion include Outlast, Escape the Backrooms, Five Nights at Freddy's: Security Breach, Poppy Playtime, and Lethal Company. We matched them by the tags players give White Mask Mansion on Steam (Horror, Psychological Horror, Survival Horror, Action, and Adventure): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · Psychological Horror

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

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

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Lethal Company
Shared: Horror · Survival Horror · Psychological Horror

Darkwood
Shared: Horror · Survival Horror · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Survival Horror

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

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

Outlast 2
Shared: Horror · Psychological Horror · Survival Horror

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil Village
Shared: Horror · Survival Horror · Action

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

The Beast Inside
Shared: Horror · Survival Horror · Adventure

The Forest
Shared: Horror · Adventure · Survival Horror

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

SILENT HILL: Townfall
Shared: Horror · Psychological Horror · Action

Alien: Isolation
Shared: Horror · Survival Horror · Stealth

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

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

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

Little Nightmares
Shared: Horror · Adventure · Psychological Horror

Amnesia: The Bunker
Shared: Horror · Survival Horror · Stealth

Penumbra Overture
Shared: Horror · Survival Horror · Adventure