Games like The Single-Eye Nightmare
Games like The Single-Eye Nightmare include The Exit 8, Inside the Backrooms, Poppy Playtime, Escape the Backrooms, and SOMA. We matched them by the tags players give The Single-Eye Nightmare on Steam (Exploration, Horror, Mythology, Walking Simulator, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Horror · Walking Simulator

Inside the Backrooms
Shared: Horror · Psychological Horror · Puzzle

Poppy Playtime
Shared: Horror · Puzzle · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

SOMA
Shared: Horror · Psychological Horror · Exploration

Lethal Company
Shared: Horror · Exploration · First-Person

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

Scanner Sombre
Shared: Exploration · Horror · Walking Simulator

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

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

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

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

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

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

Garten of Banban 2
Shared: Horror · Psychological Horror · Puzzle

Outlast
Shared: Horror · First-Person · Psychological Horror

Visage
Shared: Horror · Psychological Horror · First-Person

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

September 7th
Shared: Exploration · Horror · Walking Simulator

Dreamcore
Shared: Exploration · Walking Simulator · Psychological Horror

Firewatch
Shared: Walking Simulator · Exploration · First-Person

POOLS
Shared: Walking Simulator · Exploration · Psychological Horror

Garten of Banban 3
Shared: Horror · Psychological Horror · First-Person

Platform 8
Shared: Psychological Horror · Walking Simulator · Exploration