Games like Soviet Anomaly 7
Games like Soviet Anomaly 7 include Lethal Company, What Remains of Edith Finch, No, I'm not a Human, Outlast, and Layers of Fear (2016). We matched them by the tags players give Soviet Anomaly 7 on Steam (Walking Simulator, Indie, First-Person, Psychological Horror, and Multiple Endings): closest matches first, and among equally close ones the better-known games.

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

What Remains of Edith Finch
Shared: Walking Simulator · First-Person · Atmospheric

No, I'm not a Human
Shared: Indie · Psychological Horror · Choices Matter

Outlast
Shared: First-Person · Psychological Horror · Atmospheric

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

Firewatch
Shared: Walking Simulator · First-Person · Atmospheric

The Cabin Factory
Shared: Walking Simulator · Psychological Horror · First-Person

The Stanley Parable
Shared: Indie · Walking Simulator · First-Person

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

SOMA
Shared: Psychological Horror · Atmospheric · Horror

Scanner Sombre
Shared: Walking Simulator · First-Person · Indie

Visage
Shared: Psychological Horror · First-Person · Horror

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

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

Blair Witch
Shared: Indie · Psychological Horror · First-Person

POOLS
Shared: Walking Simulator · Psychological Horror · First-Person

Still Wakes the Deep
Shared: Psychological Horror · Walking Simulator · First-Person

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

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

The Beast Inside
Shared: First-Person · Indie · Psychological Horror

Among the Sleep - Enhanced Edition
Shared: Indie · First-Person · Walking Simulator

[Chillas Art] The Convenience Store
Shared: Indie · Psychological Horror · Horror

Mouthwashing
Shared: Psychological Horror · Indie · Walking Simulator

The Beginner's Guide
Shared: Walking Simulator · Indie · First-Person