Games like 8MAN-ENTRANCE
Games like 8MAN-ENTRANCE include Escape the Backrooms, MiSide, VERGE:Lost chapter, September 7th, and Layers of Fear (2016). We matched them by the tags players give 8MAN-ENTRANCE on Steam (Simulation, 3D Platformer, Adventure, Walking Simulator, and 3D): closest matches first, and among equally close ones the better-known games.

Escape the Backrooms
Shared: Horror · Adventure · Psychological Horror

MiSide
Shared: Horror · Psychological Horror · 3D

VERGE:Lost chapter
Shared: Walking Simulator · Simulation · Adventure

September 7th
Shared: Walking Simulator · Horror · 3D Platformer

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

Dollmare
Shared: Simulation · 3D · Horror

The Cabin Factory
Shared: Walking Simulator · Horror · Adventure

[Chillas Art] The Convenience Store
Shared: Simulation · Adventure · Horror

Firewatch
Shared: Adventure · Walking Simulator · Singleplayer

Scanner Sombre
Shared: Walking Simulator · Adventure · Horror

The Exit 8
Shared: Walking Simulator · Horror · 3D

Platform 8
Shared: Adventure · Simulation · Walking Simulator

Totally Accurate Battle Simulator
Shared: Simulation · Adventure · Singleplayer

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Rise of Insanity
Shared: Adventure · Simulation · Horror

Little Nightmares
Shared: Adventure · Horror · Singleplayer

Blair Witch
Shared: Adventure · Horror · Indie

Bad Parenting 1: Mr. Red Face
Shared: Adventure · Horror · Walking Simulator

Garten of Banban
Shared: Horror · Singleplayer · 3D

SchoolBoy Runaway
Shared: Simulation · Adventure · Horror

Visage
Shared: Horror · Adventure · Psychological Horror

Poppy Playtime
Shared: Horror · Singleplayer · Adventure

[Chillas Art] Stigmatized Property
Shared: Adventure · Simulation · Horror

Father's Day
Shared: Simulation · Walking Simulator · 3D Platformer