Games like Room 404
Games like Room 404 include The Exit 8, Platform 8, The Cabin Factory, Scanner Sombre, and Escape the Backrooms. We matched them by the tags players give Room 404 on Steam (Psychological Horror, Exploration, Immersive Sim, Simulation, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Psychological Horror · Immersive Sim

Platform 8
Shared: Psychological Horror · Simulation · Walking Simulator

The Cabin Factory
Shared: Psychological Horror · Immersive Sim · Walking Simulator

Scanner Sombre
Shared: Exploration · Walking Simulator · Psychological Horror

Escape the Backrooms
Shared: Psychological Horror · Exploration · Horror

POOLS
Shared: Psychological Horror · Exploration · Walking Simulator

Firewatch
Shared: Adventure · Walking Simulator · Exploration

September 7th
Shared: Exploration · Psychological Horror · Walking Simulator

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

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

Subliminal
Shared: Psychological Horror · Realistic · Exploration

Kiosk
Shared: Psychological Horror · Immersive Sim · Action-Adventure

The Complex: Expedition
Shared: Exploration · Psychological Horror · Horror

Five Nights at Freddy's: Security Breach
Shared: Exploration · Horror · Multiple Endings

Millennium Dream
Shared: Exploration · Walking Simulator · Psychological Horror

MiSide
Shared: Psychological Horror · Horror · 3D

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

MOLE
Shared: Psychological Horror · Simulation · Adventure

Visage
Shared: Psychological Horror · Horror · Adventure

Who's at the door?
Shared: Simulation · Immersive Sim · Walking Simulator

Lethal Company
Shared: Exploration · Psychological Horror · Horror

SOMA
Shared: Psychological Horror · Exploration · Horror

Twisted Gallery
Shared: Psychological Horror · Walking Simulator · Simulation

Internet Cafe Simulator 2
Shared: Exploration · Simulation · 3D