Games like AstroWars
Games like AstroWars include Halo: Spartan Assault, STAR WARS™ Battlefront™ II, HELLDIVERS™ 2, Escape From Duckov, and Aliens: Fireteam Elite. We matched them by the tags players give AstroWars on Steam (Action, Shooter, Top-Down Shooter, 2D, and Colorful): closest matches first, and among equally close ones the better-known games.

Halo: Spartan Assault
Shared: Action · Top-Down Shooter · Shooter

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Space

HELLDIVERS™ 2
Shared: Shooter · Action · Sci-fi

Escape From Duckov
Shared: Action · Top-Down Shooter · Shooter

Aliens: Fireteam Elite
Shared: Shooter · Action · Aliens

Hotline Miami
Shared: Action · Pixel Graphics · Top-Down

Alien Shooter
Shared: Shooter · Action · Aliens

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Top-Down

Shadowgrounds
Shared: Top-Down Shooter · Action · Shooter

Broforce
Shared: Action · 2D · Pixel Graphics

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

Alien Breed: Impact
Shared: Action · Shooter · Top-Down

HELLDIVERS™ Dive Harder Edition
Shared: Top-Down Shooter · Action · Shooter

Aliens: Colonial Marines Collection
Shared: Action · Shooter · Aliens

Halo: Spartan Strike
Shared: Action · Top-Down Shooter · Shooter

Black Mesa
Shared: Action · Shooter · Sci-fi

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

Pixel Gun 3D: PC Edition
Shared: Shooter · Action · Pixel Graphics

12 is Better Than 6
Shared: Action · Shooter · Top-Down Shooter

BALL x PIT
Shared: Action · Top-Down Shooter · Pixel Graphics

Dead Space™ 2
Shared: Shooter · Action · Survival

Halo Infinite
Shared: Shooter · Action · Sci-fi

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

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · Survival