Games like Rainbow Rage Squad
Games like Rainbow Rage Squad include Trine 2: Complete Story, Portal 2, Sonic Superstars, Brawlhalla, and Planet of Lana. We matched them by the tags players give Rainbow Rage Squad on Steam (Action, Platformer, 4 Player Local, Puzzle, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Trine 2: Complete Story
Shared: Platformer · Action-Adventure · Puzzle Platformer

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Sonic Superstars
Shared: Action · Platformer · 2D Platformer

Brawlhalla
Shared: Platformer · 2D Platformer · Action

Planet of Lana
Shared: Action · Puzzle Platformer · Puzzle

BattleBlock Theater®
Shared: Platformer · 2D · Action

It Takes Two
Shared: Puzzle · Co-op · Action-Adventure

Trine Enchanted Edition
Shared: Action-Adventure · Puzzle Platformer · 2D Platformer

Broforce
Shared: Action · Platformer · 2D

LIMBO
Shared: Platformer · Puzzle · Puzzle Platformer

Ori and the Will of the Wisps
Shared: Platformer · Action · Action-Adventure

Unravel
Shared: Action · Puzzle · Platformer

PICO PARK
Shared: Puzzle Platformer · Platformer · Action

Trine 5: A Clockwork Conspiracy
Shared: Action · Platformer · Action-Adventure

Unravel Two
Shared: Puzzle · Action · Platformer

Spelunky 2
Shared: Platformer · 2D Platformer · 4 Player Local

Human Fall Flat
Shared: Puzzle · Action · Puzzle Platformer

Rayman® Legends
Shared: Platformer · Action · 4 Player Local

Duck Game
Shared: Action · 4 Player Local · Platformer

KarmaZoo
Shared: Action · Platformer · Puzzle

Braid
Shared: Puzzle · Platformer · Puzzle Platformer

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

Move or Die
Shared: Action · 4 Player Local · Platformer

Trine 3: The Artifacts of Power
Shared: Action-Adventure · Puzzle Platformer · Puzzle