Games like Tunnel Rot
Games like Tunnel Rot include Outlast, Five Nights at Freddy's, SOMA, Outlast 2, and Five Nights at Freddy's 2. We matched them by the tags players give Tunnel Rot on Steam (Point & Click, Psychological Horror, Atmospheric, Survival Horror, and Dark): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Atmospheric · Survival Horror · Psychological Horror

Five Nights at Freddy's
Shared: Survival Horror · Psychological Horror · Horror

SOMA
Shared: Psychological Horror · Atmospheric · Horror

Outlast 2
Shared: Psychological Horror · Survival Horror · Horror

Five Nights at Freddy's 2
Shared: Survival Horror · Psychological Horror · Horror

Five Nights at Freddy's 4
Shared: Survival Horror · Horror · Point & Click

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Resident Evil Village
Shared: Survival Horror · First-Person · Horror

Fran Bow
Shared: Point & Click · Psychological Horror · Story Rich

Resident Evil 7 Biohazard
Shared: Survival Horror · Horror · First-Person

Ultimate Custom Night
Shared: Survival Horror · Horror · Singleplayer

No, I'm not a Human
Shared: Psychological Horror · Horror · Atmospheric

Mouthwashing
Shared: Psychological Horror · Atmospheric · Horror

Sally Face - Episode One
Shared: Psychological Horror · Story Rich · Dark

SILENT HILL 2
Shared: Psychological Horror · Survival Horror · Atmospheric

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

Five Nights at Freddy's 3
Shared: Survival Horror · Psychological Horror · Horror

Visage
Shared: Psychological Horror · Survival Horror · Horror

Bendy and the Ink Machine
Shared: First-Person · Horror · Survival Horror

Slender: The Arrival
Shared: Survival Horror · Horror · First-Person

Little Nightmares
Shared: Atmospheric · Horror · Dark

MiSide
Shared: Psychological Horror · Story Rich · First-Person

The Outlast Trials
Shared: Psychological Horror · Survival Horror · Horror

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