Games like The Stanley Parable
Games like The Stanley Parable include Firewatch, Jazzpunk: Director's Cut, The Beginner's Guide, THE CORRIDOR, and What Remains of Edith Finch. We matched them by the tags players give The Stanley Parable on Steam (Comedy, Indie, Walking Simulator, First-Person, and Psychological): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · First-Person · Adventure

Jazzpunk: Director's Cut
Shared: Comedy · Indie · Funny

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

THE CORRIDOR
Shared: Comedy · Walking Simulator · Psychological

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

Undertale
Shared: Indie · Funny · Comedy

Gone Home
Shared: Walking Simulator · Indie · First-Person

Little Inferno
Shared: Indie · Comedy · Funny

The Henry Stickmin Collection
Shared: Comedy · Funny · Multiple Endings

INSERT GAME HERE
Shared: Comedy · First-Person · Walking Simulator

Before Your Eyes
Shared: Indie · First-Person · Walking Simulator

Road 96
Shared: First-Person · Adventure · Indie

Octodad: Dadliest Catch
Shared: Comedy · Indie · Funny

There Is No Game: Wrong Dimension
Shared: Indie · Comedy · Funny

Slime Rancher
Shared: First-Person · Adventure · Funny

Superliminal
Shared: First-Person · Psychological · Funny

The Witness
Shared: First-Person · Indie · Walking Simulator

Toilet Chronicles
Shared: Comedy · First-Person · Adventure

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

Antichamber
Shared: Indie · First-Person · Exploration

PEAK
Shared: Comedy · First-Person · Adventure

No, I'm not a Human
Shared: Indie · First-Person · Psychological

Thank Goodness You're Here!
Shared: Comedy · Funny · Indie

South Park™: The Stick of Truth™
Shared: Comedy · Funny · Adventure