Games like THE ANOMALY UNIT
Games like THE ANOMALY UNIT include Outlast, Poppy Playtime, SOMA, MiSide, and Layers of Fear (2016). We matched them by the tags players give THE ANOMALY UNIT on Steam (Psychological Horror, First-Person, Atmospheric, Horror, and Exploration): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: First-Person · Horror · Psychological Horror

Poppy Playtime
Shared: Horror · First-Person · Singleplayer

SOMA
Shared: Psychological Horror · Horror · Atmospheric

MiSide
Shared: Psychological Horror · First-Person · Horror

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

What Remains of Edith Finch
Shared: Atmospheric · First-Person · Exploration

Garten of Banban
Shared: First-Person · Psychological Horror · Horror

Lethal Company
Shared: First-Person · Horror · Psychological Horror

Escape the Backrooms
Shared: Psychological Horror · Horror · First-Person

Visage
Shared: Psychological Horror · Horror · First-Person

Firewatch
Shared: Atmospheric · First-Person · Adventure

Outlast 2
Shared: Psychological Horror · Horror · First-Person

Resident Evil 7 Biohazard
Shared: First-Person · Horror · Singleplayer

Amnesia: The Dark Descent
Shared: Psychological Horror · Horror · Atmospheric

Backrooms: Escape Together
Shared: Psychological Horror · Horror · Atmospheric

ROUTINE
Shared: Psychological Horror · Atmospheric · Singleplayer

Inside the Backrooms
Shared: Horror · Psychological Horror · First-Person

Outer Wilds
Shared: Exploration · Atmospheric · Adventure

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · First-Person

The Exit 8
Shared: Exploration · Psychological Horror · Horror

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Singleplayer

The Cabin Factory
Shared: Psychological Horror · Horror · Atmospheric

Subliminal
Shared: Psychological Horror · Atmospheric · Singleplayer

Garten of Banban 2
Shared: First-Person · Horror · Psychological Horror