Games like Beam
Games like Beam include Portal 2, Portal, Celeste, Heavenly Bodies, and Human Fall Flat. We matched them by the tags players give Beam on Steam (Precision Platformer, Space, Puzzle Platformer, Sci-fi, and Physics): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle Platformer · Puzzle · Dark Humor

Portal
Shared: Puzzle Platformer · Puzzle · Sci-fi

Celeste
Shared: Precision Platformer · Difficult · Adventure

Heavenly Bodies
Shared: Space · Physics · Precision Platformer

Human Fall Flat
Shared: Physics · Puzzle Platformer · Puzzle

Defy Gravity Extended
Shared: Puzzle Platformer · Space · Puzzle

LIMBO
Shared: Puzzle Platformer · Puzzle · Adventure

Kerbal Space Program
Shared: Space · Physics · Science

The Swapper
Shared: Space · Sci-fi · Puzzle Platformer

Getting Over It with Bennett Foddy
Shared: Physics · Difficult · Funny

Kerbal Space Program 2
Shared: Space · Physics · Difficult

INSIDE
Shared: Puzzle Platformer · 2.5D · Adventure

A Difficult Game About Climbing
Shared: Precision Platformer · Difficult · Adventure

Deliver Us The Moon
Shared: Space · Adventure · Sci-fi

Outer Wilds
Shared: Space · Adventure · Puzzle

Little Nightmares
Shared: Puzzle Platformer · Adventure · Puzzle

Jump King
Shared: Precision Platformer · Difficult · Adventure

Super Meat Boy
Shared: Precision Platformer · Difficult · Indie

Viewfinder
Shared: Puzzle Platformer · Puzzle · Adventure

Q.U.B.E: Director's Cut
Shared: Puzzle · Sci-fi · Adventure

Planet of Lana
Shared: Puzzle Platformer · Puzzle · Adventure

COCOON
Shared: Adventure · Puzzle Platformer · Puzzle

LEGO® Star Wars™: The Skywalker Saga
Shared: Space · Adventure · Sci-fi

Seen
Shared: Adventure · Puzzle · Puzzle Platformer