Games like Only One Rectangle
Games like Only One Rectangle include Defy Gravity Extended, LIMBO, Pikuniku, Planet of Lana, and Nihilumbra. We matched them by the tags players give Only One Rectangle on Steam (Action, Indie, Casual, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Defy Gravity Extended
Shared: Indie · Platformer · Puzzle Platformer

LIMBO
Shared: Indie · Puzzle Platformer · Platformer

Pikuniku
Shared: Indie · Casual · Action

Planet of Lana
Shared: Action · Puzzle Platformer · Platformer

Nihilumbra
Shared: Indie · Platformer · Casual

FEZ
Shared: Indie · Platformer · Puzzle

BEEP
Shared: Indie · Platformer · 2D

Braid
Shared: Indie · Puzzle Platformer · Platformer

Zup! 2
Shared: Indie · Casual · Puzzle

Toki Tori
Shared: Indie · Casual · Platformer

Zup!
Shared: Indie · Casual · Puzzle

Out There Somewhere
Shared: Indie · Platformer · Action

PICO PARK
Shared: Casual · Puzzle Platformer · Platformer

Broforce
Shared: Action · 2D · Platformer

Skul: The Hero Slayer
Shared: Action · Indie · 2D

EDGE
Shared: Indie · Action · Puzzle Platformer

Zup! 3
Shared: Indie · Casual · Puzzle

BADLAND: Game of the Year Edition
Shared: Indie · Action · 2D

Zup! 4
Shared: Indie · Casual · Puzzle

ANIMAL WELL
Shared: Platformer · Puzzle · Puzzle Platformer

Zup! 8
Shared: Casual · Indie · Puzzle

Zup! S
Shared: Indie · Casual · Puzzle

Hollow Knight
Shared: Platformer · Indie · 2D

Zup! F
Shared: Indie · Casual · Puzzle