Games like Dead Purge: Outbreak
Games like Dead Purge: Outbreak include Left 4 Dead 2, Resident Evil Village, DOOM Eternal, DOOM, and Resident Evil 7 Biohazard. We matched them by the tags players give Dead Purge: Outbreak on Steam (Violent, Gore, Action, Indie, and Zombies): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Zombies · FPS · Action

Resident Evil Village
Shared: Action · Gore · Horror

DOOM Eternal
Shared: Gore · Action · Violent

DOOM
Shared: Gore · Action · FPS

Resident Evil 7 Biohazard
Shared: Gore · Horror · Zombies

Killing Floor
Shared: Zombies · FPS · Action

Back 4 Blood
Shared: Zombies · Gore · FPS

Resident Evil 2
Shared: Zombies · Gore · Action

Trepang2
Shared: Gore · Violent · FPS

Dying Light
Shared: Zombies · Gore · Horror

Killing Floor 2
Shared: Gore · Zombies · FPS

Outlast
Shared: Gore · Horror · First-Person

Outlast 2
Shared: Gore · Violent · Horror

Dead by Daylight
Shared: Gore · Violent · Horror

Resident Evil 4
Shared: Action · Zombies · Horror

Call of Duty®: Black Ops III
Shared: Zombies · Action · FPS

Resident Evil Requiem
Shared: Zombies · Action · FPS

Ready or Not
Shared: FPS · Shooter · Violent

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

The Darkness II
Shared: Gore · Action · FPS

Metro Exodus
Shared: FPS · Action · Horror

Call of Duty®
Shared: FPS · Action · Shooter

Black Mesa
Shared: Action · FPS · Shooter

The Walking Dead: Saints & Sinners
Shared: Action · Gore · Zombies