Games like Anomalum
Games like Anomalum include POOLS, Mouthwashing, Firewatch, What Remains of Edith Finch, and Layers of Fear (2016). We matched them by the tags players give Anomalum on Steam (Escape Room, Psychological Horror, Surreal, Exploration, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

POOLS
Shared: Psychological Horror · Walking Simulator · Exploration

Mouthwashing
Shared: Psychological Horror · Atmospheric · Walking Simulator

Firewatch
Shared: Walking Simulator · Atmospheric · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · Atmospheric

Layers of Fear (2016)
Shared: Psychological Horror · Walking Simulator · First-Person

SOMA
Shared: Psychological Horror · Atmospheric · Exploration

Fears to Fathom - Ironbark Lookout
Shared: Psychological Horror · Exploration · Atmospheric

Still Wakes the Deep
Shared: Psychological Horror · Walking Simulator · First-Person

Outlast
Shared: Psychological Horror · First-Person · Atmospheric

The Beginner's Guide
Shared: Walking Simulator · First-Person · Atmospheric

The Exit 8
Shared: Exploration · Walking Simulator · Psychological Horror

Superliminal
Shared: Surreal · First-Person · Psychological Horror

Visage
Shared: Psychological Horror · First-Person · Atmospheric

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

The Park®
Shared: Psychological Horror · Walking Simulator · First-Person

Psalm 5:9-13
Shared: Psychological Horror · Exploration · Walking Simulator

Summer of '58
Shared: Psychological Horror · Walking Simulator · Atmospheric

Dreamcore
Shared: Psychological Horror · Exploration · Walking Simulator

The Stanley Parable
Shared: Walking Simulator · First-Person · Psychological

Subliminal
Shared: Psychological Horror · Realistic · Atmospheric

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

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

Scanner Sombre
Shared: Exploration · Walking Simulator · Psychological Horror

Don't Play This
Shared: Psychological Horror · Exploration · Walking Simulator