Games like The Ladder
Games like The Ladder include No, I'm not a Human, What Remains of Edith Finch, The Beginner's Guide, Firewatch, and The Cabin Factory. We matched them by the tags players give The Ladder on Steam (First-Person, Choices Matter, Psychological Horror, Atmospheric, and Philosophical): closest matches first, and among equally close ones the better-known games.

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

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

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

Firewatch
Shared: Atmospheric · First-Person · Adventure

The Cabin Factory
Shared: Psychological Horror · Choices Matter · First-Person

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

Outlast
Shared: First-Person · Atmospheric · Psychological Horror

Mouthwashing
Shared: Psychological Horror · Atmospheric · Walking Simulator

KARMA: The Dark World
Shared: Psychological Horror · First-Person · Walking Simulator

Poppy Playtime
Shared: First-Person · Psychological Horror · Dark

SOMA
Shared: Psychological Horror · Atmospheric · First-Person

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

Visage
Shared: Psychological Horror · First-Person · Atmospheric

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

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

POOLS
Shared: Psychological Horror · Atmospheric · First-Person

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

Summer of '58
Shared: Psychological Horror · Atmospheric · First-Person

MiSide
Shared: Psychological Horror · First-Person · Atmospheric

The Park®
Shared: Psychological Horror · First-Person · Walking Simulator

Oxenfree
Shared: Choices Matter · Atmospheric · Adventure

ROUTINE
Shared: Psychological Horror · Atmospheric · First-Person

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

Outlast 2
Shared: Psychological Horror · First-Person · Atmospheric