Games like ROSE:RUIN
Games like ROSE:RUIN include Firewatch, What Remains of Edith Finch, Still Wakes the Deep, Layers of Fear (2016), and SOMA. We matched them by the tags players give ROSE:RUIN on Steam (Adventure, Walking Simulator, Exploration, First-Person, and Horror): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Story Rich

Still Wakes the Deep
Shared: Horror · Walking Simulator · Psychological Horror

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

SOMA
Shared: Horror · Psychological Horror · Story Rich

The Beast Inside
Shared: Adventure · Horror · First-Person

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · First-Person

Blair Witch
Shared: Adventure · Horror · First-Person

Mouthwashing
Shared: Horror · Psychological Horror · Story Rich

Outlast
Shared: First-Person · Horror · Psychological Horror

Outlast 2
Shared: Horror · First-Person · Psychological Horror

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

The Park®
Shared: Walking Simulator · Horror · First-Person

MiSide
Shared: Psychological Horror · Horror · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

Outer Wilds
Shared: Exploration · Adventure · Story Rich

Visage
Shared: Horror · Psychological Horror · First-Person

Scanner Sombre
Shared: Walking Simulator · Exploration · Adventure

Lethal Company
Shared: First-Person · Horror · Exploration

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

Fears to Fathom - Ironbark Lookout
Shared: Horror · Psychological Horror · Adventure

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

INFRA
Shared: Exploration · Walking Simulator · Adventure

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