Games like Iron Dungeon
Games like Iron Dungeon include The Binding of Isaac: Rebirth, Skul: The Hero Slayer, Enter the Gungeon, Noita, and Dungreed. We matched them by the tags players give Iron Dungeon on Steam (Action Roguelike, Side Scroller, Shoot 'Em Up, Twin Stick Shooter, and 2D Platformer): closest matches first, and among equally close ones the better-known games.
The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Difficult
Skul: The Hero Slayer
Shared: Action Roguelike · Roguelite · Side Scroller
Enter the Gungeon
Shared: Action Roguelike · Dungeon Crawler · Difficult
Noita
Shared: Dungeon Crawler · Difficult · Action Roguelike
Dungreed
Shared: Action Roguelike · Roguelite · Dungeon Crawler
30XX
Shared: Action Roguelike · Side Scroller · 2D Platformer
Hades
Shared: Action Roguelike · Roguelite · Dungeon Crawler
Super Amazing Wagon Adventure
Shared: Action Roguelike · Side Scroller · Shoot 'Em Up
Vampire Survivors
Shared: Action Roguelike · Roguelite · 2D
Anomaly Agent
Shared: Side Scroller · Action Roguelike · 2D Platformer
Caveblazers
Shared: Action Roguelike · Roguelite · 2D Platformer
Dead Estate
Shared: Action Roguelike · Twin Stick Shooter · Shoot 'Em Up
Risk of Rain (2013)
Shared: Action Roguelike · Platformer · Roguelike
Rogue Legacy
Shared: Action Roguelike · Platformer · Side Scroller
Spelunky
Shared: Action Roguelike · Platformer · Difficult
Rogue Legacy 2
Shared: Roguelite · Arcade · Platformer
Lost Castle
Shared: Action Roguelike · Side Scroller · Dungeon Crawler
Star of Providence
Shared: Action Roguelike · Shoot 'Em Up · Roguelite
The Binding of Isaac
Shared: Action Roguelike · Difficult · Roguelike
BALL x PIT
Shared: Action Roguelike · Roguelite · Shoot 'Em Up
Dead Cells
Shared: Action Roguelike · Roguelite · Roguelike
Downwell
Shared: Action Roguelike · 2D Platformer · Platformer
Spelunky 2
Shared: 2D Platformer · Platformer · Difficult
Rogue Stormers
Shared: Action Roguelike · Side Scroller · Shoot 'Em Up