Games like Floor 13
Games like Floor 13 include The Exit 8, The Painscreek Killings, Scanner Sombre, SOMA, and Mouthwashing. We matched them by the tags players give Floor 13 on Steam (Exploration, Psychological Horror, Atmospheric, Puzzle, and Detective): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Puzzle · Psychological Horror

The Painscreek Killings
Shared: Exploration · Detective · Puzzle

Scanner Sombre
Shared: Exploration · Atmospheric · Psychological Horror

SOMA
Shared: Psychological Horror · Atmospheric · Exploration

Mouthwashing
Shared: Psychological Horror · Atmospheric · Psychological

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

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

POOLS
Shared: Psychological Horror · Atmospheric · Exploration

September 7th
Shared: Exploration · Psychological Horror · Walking Simulator

MOLE
Shared: Psychological Horror · Simulation · Puzzle

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

Killer Frequency
Shared: Puzzle · Simulation · Exploration

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

Inside the Backrooms
Shared: Psychological Horror · Puzzle · Exploration

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

INFRA
Shared: Exploration · Atmospheric · Puzzle

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

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

The Vanishing of Ethan Carter
Shared: Atmospheric · Exploration · Detective

Strange Horticulture
Shared: Puzzle · Atmospheric · Detective

Outer Wilds
Shared: Exploration · Atmospheric · Puzzle

Layers of Fear 2 (2019)
Shared: Psychological Horror · Atmospheric · Exploration

Amnesia: A Machine For Pigs
Shared: Atmospheric · Psychological Horror · Exploration

DON'T SCREAM
Shared: Psychological Horror · Atmospheric · Exploration