Games like Modern Museum
Games like Modern Museum include Firewatch, Poppy Playtime, Crimson Desert Enhanced, Red Dead Redemption 2, and Five Nights at Freddy's: Security Breach. We matched them by the tags players give Modern Museum on Steam (Singleplayer, Mystery, Thriller, Survival Horror, and Open World): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Mystery · Singleplayer · Adventure

Poppy Playtime
Shared: Singleplayer · Survival Horror · Mystery

Crimson Desert Enhanced
Shared: Singleplayer · Open World · Adventure

Red Dead Redemption 2
Shared: Open World · Singleplayer · Adventure

Five Nights at Freddy's: Security Breach
Shared: Singleplayer · Survival Horror · 3D

Choo-Choo Charles
Shared: Singleplayer · Survival Horror · Open World

Outer Wilds
Shared: Mystery · Singleplayer · Open World

DREDGE
Shared: Open World · Mystery · Singleplayer

L.A. Noire
Shared: Open World · Mystery · Singleplayer

Hogwarts Legacy
Shared: Singleplayer · Open World · Adventure

Sherlock Holmes: The Devil's Daughter
Shared: Mystery · Singleplayer · Thriller

Rise of the Tomb Raider™
Shared: Singleplayer · Open World · Adventure

The Witcher 3: Wild Hunt — Remastered
Shared: Open World · Singleplayer · Adventure

Grand Theft Auto V Legacy
Shared: Open World · Singleplayer · Third Person

Fallout 4
Shared: Singleplayer · Open World · Adventure

No Man's Sky
Shared: Open World · Procedural Generation · Singleplayer

Sons Of The Forest
Shared: Open World · Survival Horror · Singleplayer

The Forest
Shared: Open World · Survival Horror · Adventure

STAR WARS Jedi: Survivor™
Shared: Singleplayer · Open World · Adventure

Sonic Frontiers
Shared: Open World · Singleplayer · Adventure

The Long Dark
Shared: Singleplayer · Open World · Adventure

Marvel’s Spider-Man Remastered
Shared: Singleplayer · Open World · Adventure

Blue Prince
Shared: Mystery · Singleplayer · Adventure

Fallout: New Vegas
Shared: Singleplayer · Open World · Adventure