Games like Boltzmann Brain
Games like Boltzmann Brain include OneShot, Brothers - A Tale of Two Sons, Outer Wilds, Papers, Please, and Rhythm Doctor. We matched them by the tags players give Boltzmann Brain on Steam (Indie, 4 Player Local, Puzzle, Arcade, and Space): closest matches first, and among equally close ones the better-known games.

OneShot
Shared: Indie · Story Rich · Puzzle

Brothers - A Tale of Two Sons
Shared: Indie · Story Rich · Puzzle

Outer Wilds
Shared: Space · Story Rich · Puzzle

Papers, Please
Shared: Indie · Puzzle · Pixel Graphics

Rhythm Doctor
Shared: Indie · Music · Story Rich

Unpacking
Shared: Puzzle · Indie · Story Rich

The Last Campfire
Shared: Puzzle · Indie · Story Rich

OMORI
Shared: Indie · Story Rich · Pixel Graphics

Carto
Shared: Indie · Puzzle · Story Rich

There Is No Game: Wrong Dimension
Shared: Indie · Puzzle · Story Rich

Chants of Sennaar
Shared: Puzzle · Indie · Colorful

A Dance of Fire and Ice
Shared: Indie · Music · Arcade

Observation
Shared: Indie · Space · Puzzle

Deliver Us The Moon
Shared: Indie · Space · Puzzle

Sally Face - Episode One
Shared: Indie · Story Rich · Puzzle

Return of the Obra Dinn
Shared: Puzzle · Indie · Story Rich

Pony Island
Shared: Indie · Puzzle · Pixel Graphics

Baba Is You
Shared: Indie · Puzzle · Pixel Graphics

Assemble with Care
Shared: Indie · Puzzle · Story Rich

AudioSurf
Shared: Indie · Music · Arcade

Melatonin
Shared: Indie · Music · Puzzle

Tetris® Effect: Connected
Shared: Puzzle · Arcade · Indie

INSIDE
Shared: Indie · Story Rich · Atmospheric

Tales of the Black Forest
Shared: Indie · Story Rich · Pixel Graphics