Games like The Gap
Games like The Gap include Layers of Fear (2016), Firewatch, Scanner Sombre, What Remains of Edith Finch, and Fears to Fathom - Ironbark Lookout. We matched them by the tags players give The Gap on Steam (Horror, Exploration, Walking Simulator, Atmospheric, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Atmospheric

Firewatch
Shared: Atmospheric · Walking Simulator · Exploration

Scanner Sombre
Shared: Exploration · Horror · Walking Simulator

What Remains of Edith Finch
Shared: Walking Simulator · Atmospheric · Exploration

Fears to Fathom - Ironbark Lookout
Shared: Horror · Atmospheric · Psychological Horror

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Atmospheric

September 7th
Shared: Horror · Exploration · Walking Simulator

ROUTINE
Shared: Atmospheric · Psychological Horror · Singleplayer

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Still Wakes the Deep
Shared: Horror · Psychological Horror · Walking Simulator

POOLS
Shared: Walking Simulator · Psychological Horror · Atmospheric

Summer of '58
Shared: Horror · Atmospheric · Walking Simulator

MiSide
Shared: Horror · Psychological Horror · Singleplayer

Lethal Company
Shared: Horror · Exploration · First-Person

The Exit 8
Shared: Exploration · Horror · Walking Simulator

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

Visage
Shared: Horror · Psychological Horror · Atmospheric

DON'T SCREAM
Shared: Horror · Psychological Horror · Atmospheric

Fears to Fathom - Woodbury Getaway
Shared: Horror · Psychological Horror · Atmospheric

Anemoiapolis: Chapter 1
Shared: Horror · Exploration · Psychological Horror

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Psalm 5:9-13
Shared: Horror · Exploration · Psychological Horror

Millennium Dream
Shared: Walking Simulator · Exploration · Atmospheric