Games like Pachiko
Games like Pachiko include Poppy Playtime, Firewatch, Escape the Backrooms, The Death | Thần Trùng, and The Room. We matched them by the tags players give Pachiko on Steam (Adventure, Horror, Mystery, Psychological Horror, and Casual): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Singleplayer · Psychological Horror

Firewatch
Shared: Adventure · Mystery · Walking Simulator

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

The Death | Thần Trùng
Shared: Horror · Psychological Horror · Adventure

The Room
Shared: Mystery · Adventure · Singleplayer

The Room Two
Shared: Mystery · Horror · Adventure

Outlast
Shared: Horror · Psychological Horror · First-Person

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Adventure

Fears to Fathom - Woodbury Getaway
Shared: Adventure · Horror · Psychological Horror

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

Ready or Not
Shared: Horror · Singleplayer · Realistic

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

The Beast Inside
Shared: Adventure · Horror · Psychological Horror

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Amnesia: A Machine For Pigs
Shared: Horror · Psychological Horror · Walking Simulator

Fears to Fathom® - Scratch Creek
Shared: Horror · Adventure · Psychological Horror

The Room 4: Old Sins
Shared: Mystery · Adventure · Singleplayer

The Room Three
Shared: Adventure · Mystery · Singleplayer

Garten of Banban 2
Shared: Horror · Singleplayer · Psychological Horror

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

Subliminal
Shared: Psychological Horror · Mystery · Singleplayer

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

From The Darkness
Shared: Horror · Psychological Horror · Adventure