Games like Apparatus: Exanimus
Games like Apparatus: Exanimus include Firewatch, What Remains of Edith Finch, NaissanceE, The Exit 8, and Dreamcore. We matched them by the tags players give Apparatus: Exanimus on Steam (Exploration, Walking Simulator, Atmospheric, Horror, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Atmospheric · Walking Simulator · Adventure

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

NaissanceE
Shared: Exploration · Atmospheric · Walking Simulator

The Exit 8
Shared: Exploration · Walking Simulator · Horror

Dreamcore
Shared: Exploration · Walking Simulator · 3D

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

POOLS
Shared: Walking Simulator · Atmospheric · Exploration

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

Scanner Sombre
Shared: Exploration · Walking Simulator · Atmospheric

CARIMARA: Beneath the forlorn limbs
Shared: Exploration · Horror · Adventure

PEAK
Shared: Exploration · Adventure · First-Person

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

Outer Wilds
Shared: Exploration · Atmospheric · Adventure

Antichamber
Shared: Exploration · First-Person · Surreal

Kairo
Shared: Exploration · Atmospheric · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Exploration · Adventure

RATSHAKER™
Shared: Horror · Exploration · First-Person

Lethal Company
Shared: Horror · Exploration · First-Person

The Vanishing of Ethan Carter
Shared: Atmospheric · Walking Simulator · Exploration

SOMA
Shared: Horror · Atmospheric · Exploration

The Witness
Shared: Exploration · First-Person · Atmospheric

INFRA
Shared: Exploration · Atmospheric · Walking Simulator

Gone Home
Shared: Walking Simulator · Exploration · Atmospheric