Games like Perikoto
Games like Perikoto include Firewatch, Five Nights at Freddy's: Secret of the Mimic, What Remains of Edith Finch, DREDGE, and Five Nights at Freddy's: Security Breach. We matched them by the tags players give Perikoto on Steam (Exploration, Stealth, Atmospheric, Lovecraftian, and First-Person): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Atmospheric · Exploration · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: VR · First-Person · Exploration

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

DREDGE
Shared: Exploration · Lovecraftian · Atmospheric

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

SOMA
Shared: Atmospheric · Exploration · Horror

Scanner Sombre
Shared: Exploration · Atmospheric · Walking Simulator

The Long Dark
Shared: Exploration · Atmospheric · First-Person

Outer Wilds
Shared: Exploration · Atmospheric · Adventure

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

Outlast
Shared: Atmospheric · First-Person · Horror

Dagon: by H. P. Lovecraft
Shared: Atmospheric · Lovecraftian · VR

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

Still Wakes the Deep
Shared: Lovecraftian · First-Person · Horror

Resident Evil 7 Biohazard
Shared: VR · First-Person · Atmospheric

Amnesia: The Dark Descent
Shared: Atmospheric · Horror · First-Person

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

Amnesia: Rebirth
Shared: First-Person · Exploration · Stealth

The Witness
Shared: Exploration · First-Person · Atmospheric

The Vanishing of Ethan Carter
Shared: Atmospheric · Exploration · First-Person

Subnautica
Shared: Exploration · Horror · Open World

The Forest
Shared: Horror · Exploration · First-Person

Subnautica 2
Shared: Exploration · Horror · First-Person

Lethal Company
Shared: First-Person · Exploration · Horror