Games like DeMon Researcher 2
Games like DeMon Researcher 2 include The Callisto Protocol™, Dead Space, Resident Evil Requiem, Warhammer 40,000: Space Marine 2, and Resident Evil 4. We matched them by the tags players give DeMon Researcher 2 on Steam (Third-Person Shooter, Action, Adventure, Sci-fi, and Horror): closest matches first, and among equally close ones the better-known games.

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

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

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

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

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

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

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

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

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

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

REMNANT II®
Shared: Action · Third-Person Shooter · Adventure

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

Resident Evil 6
Shared: Action · Third-Person Shooter · Horror

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

Scars Above
Shared: Action · Adventure · Third-Person Shooter

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

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

Atomic Heart
Shared: Adventure · Action · Horror

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

Resident Evil 5
Shared: Action · Third-Person Shooter · Horror

The Evil Within 2
Shared: Horror · Action · Survival Horror

Alan Wake
Shared: Action · Horror · Adventure

Alan Wake's American Nightmare
Shared: Action · Adventure · Third-Person Shooter

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