Games like 15 Minutes
Games like 15 Minutes include The Exit 8, Buckshot Roulette, Platform 8, Phasmophobia, and Outlast. We matched them by the tags players give 15 Minutes on Steam (Casual, Dark, Time Management, Immersive Sim, and Hidden Object): closest matches first, and among equally close ones the better-known games.

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

Buckshot Roulette
Shared: Dark · First-Person · 3D

Platform 8
Shared: Hidden Object · Immersive Sim · Walking Simulator

Phasmophobia
Shared: Dark · Investigation · Horror

Outlast
Shared: Dark · First-Person · Horror

PowerWash Simulator
Shared: Casual · 3D · Simulation

Dishonored
Shared: Stealth · Dark · First-Person

Witch It
Shared: Casual · Hidden Object · Stealth

[Chilla's Art] The Ghost Train | 幽霊列車
Shared: Casual · Immersive Sim · Hidden Object

[Chillas Art] The Convenience Store
Shared: Casual · Indie · Simulation

The Boba Teashop
Shared: Immersive Sim · Walking Simulator · Casual

[Chillas Art] Shinkansen 0 0
Shared: Casual · Immersive Sim · Investigation

MECCHA CHAMELEON
Shared: Casual · Hidden Object · Stealth

Ten Bells
Shared: Dark · Casual · Walking Simulator

The Outlast Trials
Shared: Stealth · Dark · First-Person

Mouthwashing
Shared: Dark · Walking Simulator · Horror

Streamer Life Simulator 2
Shared: Immersive Sim · Casual · Simulation

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

Garten of Banban
Shared: Dark · First-Person · 3D

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

Liars Bar
Shared: Casual · Dark · 3D

PC Building Simulator
Shared: Immersive Sim · Simulation · Casual

Thief
Shared: Stealth · Dark · First-Person

Game Keeper: Somebody Messed Up My Shop!
Shared: Immersive Sim · Casual · Hidden Object