Games like 15th Prison
Games like 15th Prison include The Exit 8, Platform 8, Atomic Heart, VLADiK BRUTAL, and Portal 2. We matched them by the tags players give 15th Prison on Steam (Action, Simulation, Action-Adventure, Puzzle, and Walking Simulator): closest matches first, and among equally close ones the better-known games.
The Exit 8
Shared: Puzzle · Walking Simulator · Exploration
Platform 8
Shared: Simulation · Walking Simulator · Psychological Horror
Atomic Heart
Shared: Action · Action-Adventure · FPS
VLADiK BRUTAL
Shared: Action · FPS · Puzzle
Portal 2
Shared: Puzzle · Puzzle Platformer · First-Person
Far Cry® 5
Shared: Action-Adventure · FPS · Action
In Sound Mind
Shared: Action · Puzzle · Psychological Horror
Aimlabs
Shared: Simulation · Action · FPS
Resident Evil Requiem
Shared: Action · Action-Adventure · FPS
KovaaK's
Shared: Action · Simulation · FPS
The Talos Principle 2
Shared: Puzzle · Puzzle Platformer · Walking Simulator
Total Chaos
Shared: Action · Action-Adventure · Psychological Horror
[Chillas Art] The Convenience Store
Shared: Simulation · Action · Psychological Horror
Lorelei and the Laser Eyes
Shared: Puzzle · Action · Action-Adventure
Indiana Jones and the Great Circle
Shared: Action-Adventure · Puzzle · Action
Inside the Backrooms
Shared: Puzzle · Psychological Horror · Exploration
Amnesia: Rebirth
Shared: Action-Adventure · Puzzle · First-Person
MOLE
Shared: Simulation · Puzzle · Psychological Horror
Poppy Playtime
Shared: Puzzle · Psychological Horror · First-Person
Scanner Sombre
Shared: Walking Simulator · Exploration · Psychological Horror
Arma 3
Shared: Action · Simulation · FPS
Escape the Backrooms
Shared: Psychological Horror · Action · Exploration
Far Cry® 6
Shared: Action-Adventure · Action · FPS
Ready or Not
Shared: FPS · Action · Realistic