Games like Terminal 81
Games like Terminal 81 include Phasmophobia, [Chillas Art] The Convenience Store, Escape the Backrooms, lily's world XD, and No, I'm not a Human. We matched them by the tags players give Terminal 81 on Steam (Action, Job Simulator, Mystery, Psychological Horror, and Retro): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Psychological Horror · Horror · Investigation

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

Escape the Backrooms
Shared: Psychological Horror · Horror · Action

lily's world XD
Shared: Psychological Horror · Mystery · Retro

No, I'm not a Human
Shared: Psychological Horror · Horror · Choices Matter

The Forest
Shared: Action · Open World · Horror

Poppy Playtime
Shared: Psychological Horror · Horror · Mystery

Atomic Heart
Shared: Action · Open World · Adventure

L.A. Noire
Shared: Mystery · Noir · Open World

We Happy Few
Shared: Action · Open World · Psychological Horror

Darkwood
Shared: Action · Psychological Horror · Horror

Pacify
Shared: Psychological Horror · Horror · Action

Hamster Hunter
Shared: Psychological Horror · Action · Horror

The Evil Within 2
Shared: Psychological Horror · Action · Horror

Grand Theft Auto V Legacy
Shared: Action · Open World · Adventure

Shift At Midnight
Shared: Retro · Horror · Mystery

[Chillas Art] Stigmatized Property
Shared: Action · Casual · Psychological Horror

Demonologist
Shared: Psychological Horror · Horror · Investigation

Sherlock Holmes Chapter One
Shared: Mystery · Action · Open World

The Outlast Trials
Shared: Psychological Horror · Action · Horror

KinitoPET
Shared: Psychological Horror · Retro · Horror

Outlast
Shared: Psychological Horror · Horror · Action

The Test: Hypothesis Rising
Shared: Psychological Horror · Mystery · Horror

We Were Here
Shared: Mystery · Psychological Horror · Horror