Games like ICARUS.1
Games like ICARUS.1 include Bright Memory: Infinite, Deliver Us The Moon, Angels Fall First, Black Mesa, and Starship Troopers: Extermination. We matched them by the tags players give ICARUS.1 on Steam (Indie, Action, and Sci-fi): closest matches first, and among equally close ones the better-known games.

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

Deliver Us The Moon
Shared: Indie · Action · Sci-fi

Angels Fall First
Shared: Action · Indie · Sci-fi

Black Mesa
Shared: Action · Sci-fi · Indie

Starship Troopers: Extermination
Shared: Action · Sci-fi · Indie

MO:Astray
Shared: Indie · Action · Sci-fi

Half-Life 2
Shared: Action · Sci-fi

Interstellar Marines
Shared: Action · Indie · Sci-fi

EVERSPACE™
Shared: Action · Indie · Sci-fi

Skul: The Hero Slayer
Shared: Indie · Action

SUPERHOT
Shared: Action · Indie · Sci-fi

Chorus
Shared: Action · Indie · Sci-fi

Project Wingman
Shared: Action · Indie · Sci-fi

Space Pirates and Zombies
Shared: Action · Indie · Sci-fi

Hotline Miami
Shared: Action · Indie

X-Morph: Defense
Shared: Action · Indie · Sci-fi

Hades
Shared: Indie · Action

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

Axiom Verge
Shared: Indie · Action · Sci-fi

Heat Signature
Shared: Indie · Action · Sci-fi

Hellpoint
Shared: Action · Sci-fi · Indie

Predecessor
Shared: Action · Sci-fi · Indie

ORION: Prelude
Shared: Action · Indie · Sci-fi

My Friend Pedro
Shared: Indie · Action