Games like Subject 7
Games like Subject 7 include Firewatch, What Remains of Edith Finch, The Stanley Parable, The Beginner's Guide, and RATSHAKER™. We matched them by the tags players give Subject 7 on Steam (Walking Simulator, Atmospheric, Surreal, Linear, and Dynamic Narration): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Atmospheric · Walking Simulator · Mystery

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

The Stanley Parable
Shared: Walking Simulator · Dynamic Narration · Indie

The Beginner's Guide
Shared: Walking Simulator · Atmospheric · Surreal

RATSHAKER™
Shared: Surreal · Atmospheric · Linear

Outer Wilds
Shared: Atmospheric · Mystery · Exploration

The Witness
Shared: Atmospheric · Walking Simulator · Singleplayer

POOLS
Shared: Walking Simulator · Atmospheric · Surreal

Obduction
Shared: Walking Simulator · Surreal · Mystery

Gone Home
Shared: Walking Simulator · Atmospheric · Indie

The Exit 8
Shared: Walking Simulator · Surreal · Exploration

BLACKSHARD
Shared: Walking Simulator · Atmospheric · Surreal

Journey
Shared: Atmospheric · Walking Simulator · Indie

NaissanceE
Shared: Atmospheric · Walking Simulator · Surreal

Scanner Sombre
Shared: Walking Simulator · Atmospheric · Linear

Everybody's Gone to the Rapture
Shared: Walking Simulator · Atmospheric · Indie

Quern - Undying Thoughts
Shared: Atmospheric · Walking Simulator · Mystery

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

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

The Vanishing of Ethan Carter
Shared: Atmospheric · Walking Simulator · Mystery

The Talos Principle
Shared: Atmospheric · Sci-fi · Singleplayer

Riven
Shared: Atmospheric · Walking Simulator · Mystery

Spirit of the North
Shared: Atmospheric · Walking Simulator · Casual

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Atmospheric · Singleplayer