Games like Primal Carnage: Onslaught
Games like Primal Carnage: Onslaught include GORN, Resident Evil 7 Biohazard, Resident Evil Village, Serious Sam Fusion 2017 (beta), and Blade and Sorcery. We matched them by the tags players give Primal Carnage: Onslaught on Steam (Indie, Action, Early Access, Dinosaurs, and First-Person): closest matches first, and among equally close ones the better-known games.

GORN
Shared: Action · VR · Indie

Resident Evil 7 Biohazard
Shared: First-Person · VR · Singleplayer

Resident Evil Village
Shared: Action · First-Person · Singleplayer

Serious Sam Fusion 2017 (beta)
Shared: Action · Indie · Gore

Blade and Sorcery
Shared: VR · Action · Gore

Hotline Miami
Shared: Action · Indie · Violent

Bright Memory: Infinite
Shared: Action · Indie · Singleplayer

Pavlov
Shared: Action · VR · First-Person

Hard Bullet
Shared: Action · VR · Indie

DOOM Eternal
Shared: Action · Gore · First-Person

Paint the Town Red
Shared: Action · Gore · Violent

BONEWORKS
Shared: Action · VR · Singleplayer

My Friend Pedro
Shared: Indie · Action · Gore

Contractors
Shared: Action · Indie · VR

Sword With Sauce
Shared: Action · Gore · First-Person

Chivalry: Medieval Warfare
Shared: Action · Indie · First-Person

Serious Sam VR: The Last Hope
Shared: Action · Indie · VR

Wolfenstein II: The New Colossus
Shared: Action · Singleplayer · Gore

Maximum Action
Shared: Action · Indie · Gore

Blood Trail
Shared: Action · VR · Gore

Trepang2
Shared: Action · Singleplayer · Gore

SUPERHOT
Shared: Action · Indie · First-Person

Hotline Miami 2: Wrong Number
Shared: Action · Gore · Indie

Beat Saber
Shared: VR · Singleplayer · First-Person