Games like RebreatheR
Games like RebreatheR include SOMA, Darkwood, Outlast, Poppy Playtime, and Subnautica 2. We matched them by the tags players give RebreatheR on Steam (Horror, Underwater, Lovecraftian, Survival Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Horror · Atmospheric · Survival Horror

Darkwood
Shared: Horror · Survival Horror · Adventure

Outlast
Shared: Horror · Survival Horror · Atmospheric

Poppy Playtime
Shared: Horror · Survival Horror · Dark

Subnautica 2
Shared: Horror · Underwater · Survival Horror

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

DREDGE
Shared: Lovecraftian · Adventure · Atmospheric

Inside the Backrooms
Shared: Horror · Survival Horror · Adventure

Still Wakes the Deep
Shared: Horror · Lovecraftian · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Adventure

Lethal Company
Shared: Horror · Survival Horror · Atmospheric

Alan Wake
Shared: Horror · Adventure · Atmospheric

Look Outside
Shared: Horror · Survival Horror · Lovecraftian

Sally Face - Episode One
Shared: Horror · Adventure · Atmospheric

Pacify
Shared: Horror · Survival Horror · Dark

The Forest
Shared: Horror · Adventure · Survival Horror

Outlast 2
Shared: Horror · Survival Horror · Atmospheric

SIGNALIS
Shared: Survival Horror · Atmospheric · Lovecraftian

Backrooms: Escape Together
Shared: Horror · Survival Horror · Atmospheric

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

Penumbra Overture
Shared: Horror · Survival Horror · Adventure

Visage
Shared: Horror · Survival Horror · Atmospheric

Escape the Backrooms
Shared: Horror · Survival Horror · Adventure

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Mystery