Games like 100 Rooms
Games like 100 Rooms include The Exit 8, Internet Cafe Simulator 2, September 7th, Prison Escape Simulator: Dig Out, and The Stanley Parable. We matched them by the tags players give 100 Rooms on Steam (Casual, Walking Simulator, Exploration, Dungeon Crawler, and Immersive Sim): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Walking Simulator · Immersive Sim

Internet Cafe Simulator 2
Shared: Exploration · 3D · First-Person

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

Prison Escape Simulator: Dig Out
Shared: Casual · 3D · Exploration

The Stanley Parable
Shared: Walking Simulator · First-Person · Exploration

PC Building Simulator
Shared: Immersive Sim · 3D · First-Person

Slime Rancher
Shared: Exploration · Casual · First-Person

POOLS
Shared: Walking Simulator · Exploration · Realistic

PowerWash Simulator
Shared: Casual · 3D · First-Person

Fatekeeper
Shared: First-Person · Immersive Sim · Dark Fantasy

Ultimate Fishing Simulator
Shared: 3D · Immersive Sim · Casual

Road 96: Mile 0
Shared: Exploration · Walking Simulator · Casual

Firewatch
Shared: Walking Simulator · Exploration · First-Person

Finnish Cottage Simulator
Shared: Casual · 3D · First-Person

The Cabin Factory
Shared: Walking Simulator · Immersive Sim · First-Person

Botany Manor
Shared: Exploration · Walking Simulator · Immersive Sim

Lushfoil Photography Sim
Shared: Exploration · Walking Simulator · Realistic

Dreamcore
Shared: Walking Simulator · Exploration · First-Person

Arx Fatalis
Shared: Immersive Sim · First-Person · Dungeon Crawler

Riven
Shared: Exploration · First-Person · Walking Simulator

Seafarer: The Ship Sim
Shared: Casual · Exploration · Immersive Sim

DrainSim
Shared: Casual · First-Person · 3D

Platform 8
Shared: Walking Simulator · Exploration · Immersive Sim

Spirit of the North
Shared: Exploration · Casual · Walking Simulator