Games like Iron Soul
Games like Iron Soul include STAR WARS™ Battlefront™ II, HELLDIVERS™ 2, STAR WARS™ Battlefront II (Classic, 2005), Vanquish, and Bright Memory: Infinite. We matched them by the tags players give Iron Soul on Steam (Action, Indie, Sci-fi, Third-Person Shooter, and Shooter): closest matches first, and among equally close ones the better-known games.

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Third-Person Shooter

HELLDIVERS™ 2
Shared: Third-Person Shooter · Action · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Third-Person Shooter

Vanquish
Shared: Action · Sci-fi · Third-Person Shooter

Bright Memory: Infinite
Shared: Action · Indie · Sci-fi

PRAGMATA
Shared: Action · Sci-fi · Third-Person Shooter

Warhammer 40,000: Space Marine - Anniversary Edition
Shared: Action · Sci-fi · Third-Person Shooter

Binary Domain
Shared: Action · Sci-fi · Third-Person Shooter

Half-Life 2
Shared: Action · Sci-fi · Shooter

Black Mesa
Shared: Action · Sci-fi · Shooter

My Friend Pedro
Shared: Action · Indie · Shooter

Intrusion 2
Shared: Action · Indie · Sci-fi

Call of Duty®: Black Ops III
Shared: Action · Shooter · Singleplayer

EARTH DEFENSE FORCE 6
Shared: Action · Third-Person Shooter · Sci-fi

Grand Theft Auto V Legacy
Shared: Action · Shooter · Third-Person Shooter

Dead Space
Shared: Third-Person Shooter · Sci-fi · Shooter

Hard Reset Extended Edition
Shared: Action · Sci-fi · Indie

BioShock Infinite
Shared: Action · Shooter · Singleplayer

Marvel's Guardians of the Galaxy
Shared: Action · Singleplayer · Third-Person Shooter

BEEP
Shared: Indie · Platformer · Action

Zombotron
Shared: Action · Indie · Sci-fi

KovaaK's
Shared: Action · Indie · Shooter

Dead Space (2008)
Shared: Action · Sci-fi · Third-Person Shooter

Warhammer 40,000: Space Marine 2
Shared: Action · Third-Person Shooter · Sci-fi