Games like I Am The Hero
Games like I Am The Hero include Broforce, Streets of Rage 4, Full Metal Furies, Charlie Murder, and Terraria. We matched them by the tags players give I Am The Hero on Steam (Action, Indie, Adventure, Beat 'em up, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Pixel Graphics · Indie

Streets of Rage 4
Shared: Action · Indie · Beat 'em up

Full Metal Furies
Shared: Action · Indie · Beat 'em up

Charlie Murder
Shared: Action · Indie · Beat 'em up

Terraria
Shared: Adventure · Pixel Graphics · 2D

Absolum
Shared: Beat 'em up · Action · Adventure

Dungeon Munchies
Shared: Action · Indie · Adventure

Shank 2
Shared: Action · Indie · Beat 'em up

Castle Crashers®
Shared: Beat 'em up · 2D · Adventure

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

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

UFO 50
Shared: Indie · Action · Pixel Graphics

Hero Siege
Shared: Pixel Graphics · RPG · Indie

Hyper Light Drifter
Shared: Indie · Pixel Graphics · Adventure

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

SANABI
Shared: Action · Pixel Graphics · Adventure

Hammerwatch
Shared: Indie · Action · RPG

The Vagrant
Shared: Action · RPG · Adventure

Streets of Rogue
Shared: Pixel Graphics · Action · Indie

The friends of Ringo Ishikawa
Shared: Action · Pixel Graphics · Beat 'em up

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Beat 'em up · Pixel Graphics · Action

Shank
Shared: Action · Indie · Beat 'em up

Rogue Heroes: Ruins of Tasos
Shared: Adventure · Action · RPG

ICEY
Shared: Action · Adventure · Indie