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

SOMA
Shared: Horror · Psychological Horror · Atmospheric

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

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

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

Firewatch
Shared: Atmospheric · Walking Simulator · Adventure

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

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

Poppy Playtime
Shared: Horror · Psychological Horror · Dark

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

DON'T SCREAM
Shared: Horror · Psychological Horror · Atmospheric

Visage
Shared: Horror · Psychological Horror · Dark

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Little Nightmares II
Shared: Horror · Dark · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Dark

Phasmophobia
Shared: Horror · Psychological Horror · Supernatural

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

Outer Wilds
Shared: Exploration · Atmospheric · Mystery

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

Inside the Backrooms
Shared: Horror · Psychological Horror · Atmospheric

Summer of '58
Shared: Horror · Atmospheric · Psychological Horror

Layers of Fear 2 (2019)
Shared: Horror · Psychological Horror · Atmospheric

Psalm 5:9-13
Shared: Horror · Psychological Horror · Walking Simulator

ROUTINE
Shared: Psychological Horror · Atmospheric · Horror

Garten of Banban
Shared: Horror · Psychological Horror · Dark