Games like I Can't Escape: Darkness
Games like I Can't Escape: Darkness include Outlast, Poppy Playtime, Little Nightmares, Lethal Company, and Amnesia: The Dark Descent. We matched them by the tags players give I Can't Escape: Darkness on Steam (Horror, Atmospheric, Adventure, Indie, and First-Person): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Atmospheric · First-Person

Poppy Playtime
Shared: Horror · First-Person · Dark

Little Nightmares
Shared: Horror · Atmospheric · Adventure

Lethal Company
Shared: Horror · First-Person · Survival Horror

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

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

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

Inside the Backrooms
Shared: Horror · Adventure · Survival Horror

SOMA
Shared: Horror · Atmospheric · Dark

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

Penumbra Overture
Shared: Horror · Adventure · First-Person

Little Nightmares II
Shared: Horror · Adventure · Atmospheric

Among the Sleep - Enhanced Edition
Shared: Horror · Atmospheric · Indie

LIMBO
Shared: Indie · Atmospheric · Adventure

Bendy and the Dark Revival
Shared: Horror · First-Person · Adventure

INSIDE
Shared: Atmospheric · Horror · Indie

IMSCARED
Shared: Horror · Indie · Adventure

Ultimate Custom Night
Shared: Horror · Difficult · First-Person

Five Nights at Freddy's 2
Shared: Horror · First-Person · Indie

Outlast 2
Shared: Horror · First-Person · Atmospheric

Visage
Shared: Horror · Atmospheric · First-Person

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

Granny
Shared: Horror · First-Person · Survival Horror

Blair Witch
Shared: Horror · Adventure · Indie