Games like Mask Up
Games like Mask Up include Spelunky, Risk of Rain (2013), Spelunky 2, Skul: The Hero Slayer, and Rogue Legacy. We matched them by the tags players give Mask Up on Steam (Action Roguelike, Combat Racing, Runner, 2D Platformer, and Perma Death): closest matches first, and among equally close ones the better-known games.
Spelunky
Shared: Action Roguelike · Platformer · Roguelike
Risk of Rain (2013)
Shared: Action Roguelike · Platformer · Roguelike
Spelunky 2
Shared: 2D Platformer · Platformer · Perma Death
Skul: The Hero Slayer
Shared: Action Roguelike · Roguelike · Platformer
Rogue Legacy
Shared: Action Roguelike · Platformer · Roguelike
Caveblazers
Shared: Action Roguelike · Platformer · 2D Platformer
30XX
Shared: Action Roguelike · 2D Platformer · Perma Death
Vampire Survivors
Shared: Action Roguelike · 2D · Roguelike
Have a Nice Death
Shared: Action Roguelike · 2D Platformer · 2D
Downwell
Shared: Action Roguelike · Platformer · 2D Platformer
Pizza Tower
Shared: 2D Platformer · Platformer · Funny
Dead Cells
Shared: Action Roguelike · Roguelike · 2D
Rogue Legacy 2
Shared: Arcade · Platformer · Action
The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Indie
Noita
Shared: Roguelike · Action Roguelike · Perma Death
BlazBlue Entropy Effect
Shared: Action Roguelike · Platformer · 2D
Anomaly Agent
Shared: Action Roguelike · 2D Platformer · Platformer
20XX
Shared: Action Roguelike · Platformer · 2D Platformer
The Binding of Isaac
Shared: Action Roguelike · Roguelike · Indie
Crab Champions
Shared: Action Roguelike · Arcade · Roguelike
ALTF4
Shared: Runner · Arcade · Platformer
Shovel Knight Dig
Shared: Action Roguelike · 2D Platformer · Roguelike
Megabonk
Shared: Action Roguelike · Roguelike · Indie
Spiritfall
Shared: Action Roguelike · 2D Platformer · Platformer