Games like Unbound
Games like Unbound include Celeste, LIMBO, Super Meat Boy, Defy Gravity Extended, and Portal 2. We matched them by the tags players give Unbound on Steam (Precision Platformer, Puzzle Platformer, Action, Puzzle, and Difficult): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Platformer

LIMBO
Shared: Puzzle Platformer · Puzzle · Platformer

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Defy Gravity Extended
Shared: Puzzle Platformer · Puzzle · Platformer

Portal 2
Shared: Puzzle · Platformer · Puzzle Platformer

Hollow Knight
Shared: Platformer · Difficult · 2D

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Portal
Shared: Puzzle Platformer · Puzzle · Action

Nine Sols
Shared: Difficult · Action · Platformer

Jump King
Shared: Precision Platformer · Difficult · Action

Thomas Was Alone
Shared: Precision Platformer · Platformer · Puzzle Platformer

Braid
Shared: Puzzle Platformer · Puzzle · Platformer

Planet of Lana
Shared: Puzzle Platformer · Action · Puzzle

Hollow Knight: Silksong
Shared: Difficult · 2D · Platformer

SANABI
Shared: Action · Story Rich · 2D

Out There Somewhere
Shared: Platformer · Puzzle · Action

INSIDE
Shared: Puzzle Platformer · Story Rich · Puzzle

Katana ZERO
Shared: Action · Platformer · Story Rich

Nihilumbra
Shared: Puzzle · Puzzle Platformer · Platformer

ANIMAL WELL
Shared: Puzzle · Puzzle Platformer · Platformer

Öoo
Shared: Puzzle Platformer · Puzzle · 2D

VVVVVV
Shared: Precision Platformer · Platformer · Difficult

The End Is Nigh
Shared: Precision Platformer · Platformer · Difficult

Will You Snail?
Shared: Precision Platformer · Difficult · Puzzle Platformer