Games like Starboost EX
Games like Starboost EX include HELLDIVERS™ 2, Deliver Us The Moon, Warhammer 40,000: Space Marine 2, Dead Space (2008), and Dead Space. We matched them by the tags players give Starboost EX on Steam (Action, Indie, Adventure, Space, and Third-Person Shooter): closest matches first, and among equally close ones the better-known games.

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

Deliver Us The Moon
Shared: Indie · Action · Adventure

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

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

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

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

Grand Theft Auto V Legacy
Shared: Action · Adventure · Shooter

Chorus
Shared: Action · Indie · Adventure

Tomb Raider Game of the Year
Shared: Action · Adventure · Third-Person Shooter

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

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

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

The Callisto Protocol™
Shared: Space · Third-Person Shooter · Sci-fi

Star Wars Outlaws
Shared: Action · Adventure · Space

Gears 5
Shared: Action · Adventure · Third-Person Shooter

Aimlabs
Shared: Action · Shooter · Third-Person Shooter

Red Dead Redemption 2
Shared: Action · Adventure · Shooter

PRAGMATA
Shared: Action · Third-Person Shooter · Adventure

Mass Effect (2007)
Shared: Action · Space · Sci-fi

STAR WARS Jedi: Survivor™
Shared: Action · Adventure · Space

Max Payne 3
Shared: Action · Third-Person Shooter · Shooter

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

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

RoboCop: Rogue City
Shared: Action · Shooter · Cyberpunk