Games like Mulletman and the Molemen
Games like Mulletman and the Molemen include Celeste, Out There Somewhere, LIMBO, Skul: The Hero Slayer, and Katana ZERO. We matched them by the tags players give Mulletman and the Molemen on Steam (Indie, Pixel Graphics, Platformer, Action, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Pixel Graphics · Indie · Platformer

Out There Somewhere
Shared: Pixel Graphics · Indie · Platformer

LIMBO
Shared: Indie · Puzzle Platformer · Platformer

Skul: The Hero Slayer
Shared: Indie · Pixel Graphics · Action

Katana ZERO
Shared: Pixel Graphics · Action · Platformer

Defy Gravity Extended
Shared: Indie · Platformer · Puzzle Platformer

ANIMAL WELL
Shared: Pixel Graphics · Platformer · Puzzle

FEZ
Shared: Indie · Platformer · Pixel Graphics

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

Risk of Rain (2013)
Shared: Indie · Platformer · Pixel Graphics

Super Meat Boy
Shared: Platformer · Indie · Pixel Graphics

MO:Astray
Shared: Indie · Pixel Graphics · Action

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

Broforce
Shared: Pixel Graphics · Action · Platformer

SANABI
Shared: Pixel Graphics · Action · Indie

Jump King
Shared: Indie · Pixel Graphics · Difficult

VVVVVV
Shared: Pixel Graphics · Indie · Platformer

Iconoclasts
Shared: Indie · Pixel Graphics · Action

Hollow Knight
Shared: Platformer · Indie · Difficult

Rain World
Shared: Indie · Pixel Graphics · Difficult

ElecHead
Shared: Platformer · Pixel Graphics · Puzzle Platformer

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Gunpoint
Shared: Indie · Pixel Graphics · Puzzle

Hotline Miami
Shared: Indie · Action · Pixel Graphics