Games like Alpha Rooms
Games like Alpha Rooms include POOLS, Firewatch, The Exit 8, The Witness, and Slime Rancher. We matched them by the tags players give Alpha Rooms on Steam (Exploration, Choose Your Own Adventure, Walking Simulator, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

POOLS
Shared: Walking Simulator · Exploration · Psychological Horror

Firewatch
Shared: Walking Simulator · Exploration · First-Person

The Exit 8
Shared: Exploration · Walking Simulator · Psychological Horror

The Witness
Shared: Exploration · First-Person · Open World

Slime Rancher
Shared: Exploration · First-Person · Open World

Dreamcore
Shared: Exploration · Walking Simulator · First-Person

Scanner Sombre
Shared: Exploration · Walking Simulator · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · First-Person

A Short Hike
Shared: Exploration · Relaxing · Open World

Escape the Backrooms
Shared: Psychological Horror · Exploration · First-Person

The Long Dark
Shared: Exploration · Open World · First-Person

No Man's Sky
Shared: Exploration · Open World · First-Person

Subnautica 2
Shared: Exploration · First-Person · Open World

Slime Rancher 2
Shared: Relaxing · First-Person · Open World

Road 96: Mile 0
Shared: Exploration · Choose Your Own Adventure · Walking Simulator

Fallout 4
Shared: Exploration · Open World · First-Person

Dear Esther: Landmark Edition
Shared: Exploration · Walking Simulator · First-Person

Out of Ore
Shared: Exploration · Choose Your Own Adventure · 3D

Lethal Company
Shared: First-Person · Exploration · Psychological Horror

September 7th
Shared: Exploration · Walking Simulator · First-Person

Outer Wilds
Shared: Exploration · Open World · First-Person

Big Walk
Shared: Exploration · Open World · Relaxing

Proteus
Shared: Exploration · Walking Simulator · Relaxing

Backrooms: Escape Together
Shared: Psychological Horror · First-Person · Exploration