Games like The Callisto Protocol™
Games like The Callisto Protocol™ include Dead Space, Dead Space™ 2, Dead Space (2008), Resident Evil 4, and HELLDIVERS™ 2. We matched them by the tags players give The Callisto Protocol™ on Steam (Horror, Sci-fi, Survival Horror, Third-Person Shooter, and Space): closest matches first, and among equally close ones the better-known games.

Dead Space
Shared: Horror · Survival Horror · Third-Person Shooter

Dead Space™ 2
Shared: Horror · Survival Horror · Third-Person Shooter

Dead Space (2008)
Shared: Horror · Sci-fi · Survival Horror

Resident Evil 4
Shared: Horror · Survival Horror · Third-Person Shooter

HELLDIVERS™ 2
Shared: Third-Person Shooter · Sci-fi · Shooter

Resident Evil Requiem
Shared: Horror · Survival Horror · Third-Person Shooter

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

The Last of Us™ Part I
Shared: Horror · Third-Person Shooter · Story Rich

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

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

Dead Space™ 3
Shared: Horror · Sci-fi · Third-Person Shooter

Resident Evil 4 (2005)
Shared: Survival Horror · Horror · Third-Person Shooter

The Last of Us™ Part II Remastered
Shared: Third-Person Shooter · Horror · Action-Adventure

Cronos: The New Dawn
Shared: Horror · Survival Horror · Sci-fi

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

Alien: Isolation
Shared: Horror · Sci-fi · Survival Horror

Marvel's Guardians of the Galaxy
Shared: Third-Person Shooter · Sci-fi · Action-Adventure

Star Wars Outlaws
Shared: Sci-fi · Third Person · Action-Adventure

Mass Effect (2007)
Shared: Sci-fi · Space · Third-Person Shooter

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

STAR WARS Jedi: Fallen Order™
Shared: Sci-fi · Action-Adventure · Third Person

The Evil Within 2
Shared: Horror · Survival Horror · Story Rich

Aliens: Fireteam Elite 2
Shared: Horror · Shooter · Space

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