Games like Koala Kids
Games like Koala Kids include Trine 2: Complete Story, Webbed, Braid, Celeste, and FEZ. We matched them by the tags players give Koala Kids on Steam (Puzzle Platformer, Retro, Local Co-Op, Puzzle, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Trine 2: Complete Story
Shared: Puzzle Platformer · Puzzle · 2D Platformer

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

Braid
Shared: Puzzle Platformer · Puzzle · 2D Platformer

Celeste
Shared: Pixel Graphics · 2D Platformer · Platformer

FEZ
Shared: Puzzle · Platformer · Puzzle Platformer

LIMBO
Shared: Puzzle Platformer · Puzzle · Platformer

Geometry Dash
Shared: Level Editor · Singleplayer · Platformer

Portal 2
Shared: Puzzle · Puzzle Platformer · Platformer

PICO PARK
Shared: Puzzle Platformer · Local Co-Op · Puzzle

Sonic Mania
Shared: Retro · Platformer · 2D

Out There Somewhere
Shared: Puzzle · Platformer · Retro

Defy Gravity Extended
Shared: Puzzle Platformer · Puzzle · Platformer

ElecHead
Shared: Puzzle Platformer · Puzzle · Retro

CATO: Buttered Cat
Shared: Puzzle Platformer · Puzzle · Platformer

BattleBlock Theater®
Shared: Platformer · Level Editor · Local Co-Op

Door Kickers: Action Squad
Shared: Local Co-Op · Retro · 2D Platformer

Super Meat Boy
Shared: Platformer · 2D Platformer · Retro

Öoo
Shared: Puzzle Platformer · Puzzle · 2D Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Singleplayer

Baba Is You
Shared: Puzzle · Singleplayer · Pixel Graphics

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

ANIMAL WELL
Shared: Puzzle Platformer · Puzzle · Platformer

The Messenger
Shared: Retro · Platformer · Pixel Graphics

Moonleap
Shared: Puzzle Platformer · Puzzle · Platformer