Games like CatMxn: Chapter 1
Games like CatMxn: Chapter 1 include Pizza Tower, Nine Sols, Thank Goodness You're Here!, SANABI, and Pumpkin Jack. We matched them by the tags players give CatMxn: Chapter 1 on Steam (Action, Adventure, Platformer, Visual Novel, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Nine Sols
Shared: Action · Platformer · Hand-drawn

Thank Goodness You're Here!
Shared: Adventure · Hand-drawn · Comedy

SANABI
Shared: Action · Adventure · 2D Platformer

Pumpkin Jack
Shared: Action · Adventure · Colorful

Sonic Superstars
Shared: Action · Platformer · Adventure

SONIC X SHADOW GENERATIONS
Shared: Action · Platformer · Adventure

Hollow Knight
Shared: Platformer · Adventure · Action

Psychonauts
Shared: Platformer · Adventure · Action

South Park™: The Stick of Truth™
Shared: Adventure · Action · Comedy

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure

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

Katana ZERO
Shared: Action · Platformer · 2D Platformer

Neva
Shared: Adventure · Platformer · Colorful

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

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

Sonic Origins
Shared: Action · Adventure · 2D Platformer

BattleBlock Theater®
Shared: Platformer · Comedy · Action

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

Angry Video Game Nerd Adventures
Shared: Action · Platformer · Adventure

Sonic the Hedgehog 4 Episode 1
Shared: Action · Platformer · Adventure

Unravel
Shared: Action · Adventure · Platformer

Rogue Legacy 2
Shared: Action · Platformer · Adventure

GRIS
Shared: Adventure · Platformer · Hand-drawn

