Games like Mr. Walker's Basement
Games like Mr. Walker's Basement include Outlast, Outlast 2, Resident Evil 7 Biohazard, Poppy Playtime, and Five Nights at Freddy's 2. We matched them by the tags players give Mr. Walker's Basement on Steam (Survival, Horror, Atmospheric, Point & Click, and Strategy): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Atmospheric · First-Person

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

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

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

Ultimate Custom Night
Shared: Horror · Singleplayer · Survival

MiSide
Shared: Horror · Psychological Horror · First-Person

Five Nights at Freddy's
Shared: Horror · Singleplayer · Point & Click

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

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

No, I'm not a Human
Shared: Horror · Atmospheric · Psychological Horror

Mouthwashing
Shared: Horror · Atmospheric · Psychological Horror

The Forest
Shared: Survival · Horror · First-Person

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

Fran Bow
Shared: Point & Click · Horror · Psychological Horror

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Firewatch
Shared: Atmospheric · First-Person · Adventure

Metro Exodus
Shared: Atmospheric · Singleplayer · Horror

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

Dead by Daylight
Shared: Horror · Survival · Gore

Sally Face - Episode One
Shared: Horror · Psychological Horror · Story Rich

METRO 2033 Redux
Shared: Atmospheric · Horror · Singleplayer

Layers of Fear (2016)
Shared: Horror · Atmospheric · Psychological Horror

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