Games like Square Brothers
Games like Square Brothers include FEZ, Celeste, Out There Somewhere, SANABI, and Shovel Knight: Treasure Trove. We matched them by the tags players give Square Brothers on Steam (1990's, Retro, Casual, Pixel Graphics, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

FEZ
Shared: Pixel Graphics · Platformer · Puzzle

Celeste
Shared: Pixel Graphics · 2D Platformer · Platformer

Out There Somewhere
Shared: Pixel Graphics · Platformer · Retro

SANABI
Shared: Pixel Graphics · 2D Platformer · Singleplayer

Shovel Knight: Treasure Trove
Shared: Retro · Pixel Graphics · Platformer

Braid
Shared: Puzzle Platformer · 2D Platformer · Puzzle

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Super Meat Boy
Shared: Pixel Graphics · Platformer · 2D Platformer

Sonic Origins
Shared: Retro · 2D Platformer · Pixel Graphics

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer

The Messenger
Shared: Retro · Pixel Graphics · Platformer

Kaze and the Wild Masks
Shared: 1990's · Casual · Retro

ElecHead
Shared: Puzzle Platformer · Pixel Graphics · Retro

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · Puzzle

VVVVVV
Shared: Pixel Graphics · Retro · 2D Platformer

Papers, Please
Shared: Pixel Graphics · Singleplayer · Retro

Webbed
Shared: Pixel Graphics · 2D Platformer · Puzzle Platformer

Squishy the Suicidal Pig
Shared: Puzzle Platformer · Pixel Graphics · Platformer

ANIMAL WELL
Shared: Pixel Graphics · Puzzle Platformer · Puzzle

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Singleplayer

There Is No Game: Wrong Dimension
Shared: Pixel Graphics · Casual · Puzzle

Sonic Mania
Shared: Retro · Pixel Graphics · Platformer

Moonleap
Shared: Puzzle Platformer · Pixel Graphics · Platformer

Portal 2
Shared: Singleplayer · Platformer · Puzzle Platformer