Games like George's Nightmare
Games like George's Nightmare include Outlast, Buckshot Roulette, The Beast Inside, Ready or Not, and [Chillas Art] The Convenience Store. We matched them by the tags players give George's Nightmare on Steam (Strategy, Action, Adventure, Indie, and Horror): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · First-Person · Psychological Horror

Buckshot Roulette
Shared: Strategy · Horror · First-Person

The Beast Inside
Shared: Adventure · Horror · Action

Ready or Not
Shared: Realistic · Horror · Action

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

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

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

Darkwood
Shared: Adventure · Horror · Action

We Happy Few
Shared: Adventure · Action · Indie

Spooky's Jump Scare Mansion: HD Renovation
Shared: Adventure · Indie · Horror

The Forest
Shared: Horror · Adventure · Action

Zort
Shared: Horror · Psychological Horror · Action

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

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

The Outlast Trials
Shared: Horror · Psychological Horror · First-Person

Psychopomp
Shared: Horror · Psychological Horror · Indie

Total Chaos
Shared: Action · Adventure · Horror

Bendy and the Dark Revival
Shared: Action · Horror · Adventure

[Chillas Art] Stigmatized Property
Shared: Indie · Adventure · Horror

SILENT HILL: Townfall
Shared: Action · Adventure · Horror

Blair Witch
Shared: Adventure · Horror · Indie

Mouthwashing
Shared: Horror · Psychological Horror · Indie

The Hat Man: Shadow Ward
Shared: Indie · Horror · Adventure

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