Games like Rooten
Games like Rooten include SOMA, Firewatch, What Remains of Edith Finch, Layers of Fear (2016), and Little Nightmares. We matched them by the tags players give Rooten on Steam (Indie, Horror, Walking Simulator, Dark, and Atmospheric): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Horror · Atmospheric · Dark

Firewatch
Shared: Walking Simulator · Atmospheric · Indie

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

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

Little Nightmares
Shared: Horror · Atmospheric · Indie

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Atmospheric

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

Mouthwashing
Shared: Horror · Indie · Atmospheric

SUNLESS SEA
Shared: Exploration · Dark · Lovecraftian

INSIDE
Shared: Horror · Dark · Atmospheric

Sally Face - Episode One
Shared: Indie · Horror · Dark

Visage
Shared: Horror · Dark · Indie

Look Outside
Shared: Horror · Survival Horror · Lovecraftian

Slender: The Arrival
Shared: Horror · Indie · Dark

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

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

Outlast
Shared: Horror · Atmospheric · Survival Horror

LIMBO
Shared: Indie · Dark · Atmospheric

Darkwood
Shared: Horror · Dark · Survival Horror

DREDGE
Shared: Exploration · Lovecraftian · Atmospheric

Little Nightmares II
Shared: Horror · Dark · Atmospheric

Tiny Bunny
Shared: Horror · Dark · Atmospheric

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Dark · Horror

Layers of Fear 2 (2019)
Shared: Horror · Indie · Walking Simulator