Games like Spacetron
Games like Spacetron include STAR WARS™ Battlefront™ II, Escape From Duckov, HELLDIVERS™ 2, STAR WARS™ Battlefront II (Classic, 2005), and Grand Theft Auto V Legacy. We matched them by the tags players give Spacetron on Steam (Action, Shooter, Third-Person Shooter, Top-Down Shooter, and 2D): closest matches first, and among equally close ones the better-known games.

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

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

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

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

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

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · Third-Person Shooter

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

Just Cause™ 3
Shared: Action · Third-Person Shooter · Shooter

Aliens: Fireteam Elite
Shared: Shooter · Action · Third-Person Shooter

The Bureau: XCOM Declassified
Shared: Action · Third-Person Shooter · Shooter

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

Tom Clancy's Ghost Recon® Wildlands
Shared: Shooter · Action · Third-Person Shooter

Dead Space™ 2
Shared: Third-Person Shooter · Shooter · Action

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

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

Grand Theft Auto IV: The Complete Edition
Shared: Action · Third-Person Shooter · Shooter

Red Dead Redemption 2
Shared: Action · Shooter · Third-Person Shooter

Aliens: Fireteam Elite 2
Shared: Action · Shooter · Third-Person Shooter

Halo Infinite
Shared: Shooter · Action · Sci-fi

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

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

Tom Clancy’s The Division™
Shared: Action · Third-Person Shooter · Shooter

Star Wars Outlaws
Shared: Action · Shooter · Third-Person Shooter

Tom Clancy's Ghost Recon® Breakpoint
Shared: Shooter · Action · Third-Person Shooter