Games like おんがくしつ / MUSIC ROOM
Games like おんがくしつ / MUSIC ROOM include Firewatch, Hellblade: Senua's Sacrifice, The Stanley Parable, Ready or Not, and Layers of Fear (2016). We matched them by the tags players give おんがくしつ / MUSIC ROOM on Steam (Horror, Walking Simulator, Adventure, Psychological, and Modern): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Singleplayer

Hellblade: Senua's Sacrifice
Shared: Psychological · Horror · Adventure

The Stanley Parable
Shared: Walking Simulator · Psychological · Indie

Ready or Not
Shared: Horror · FPS · Singleplayer

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

Buckshot Roulette
Shared: Horror · Singleplayer · Psychological

Mouthwashing
Shared: Horror · Psychological · Walking Simulator

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Adventure

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Blair Witch
Shared: Horror · Adventure · Indie

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

Little Nightmares II
Shared: Horror · Adventure · Singleplayer

The Beginner's Guide
Shared: Walking Simulator · Indie · Adventure

Resident Evil Requiem
Shared: Horror · Singleplayer · FPS

The Hat Man: Shadow Ward
Shared: Horror · Adventure · Indie

Layers of Fear 2 (2019)
Shared: Horror · Walking Simulator · Indie

Among the Sleep - Enhanced Edition
Shared: Horror · Adventure · Walking Simulator

Atomic Heart
Shared: Adventure · Horror · Singleplayer

Poppy Playtime
Shared: Horror · Singleplayer · Adventure

The Park®
Shared: Horror · Walking Simulator · Adventure

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

The Medium
Shared: Horror · Adventure · Singleplayer

The Beast Inside
Shared: Horror · Adventure · Singleplayer

Kona
Shared: Adventure · Singleplayer · Walking Simulator