Games like ZomDay
Games like ZomDay include Left 4 Dead 2, The Walking Dead: Saints & Sinners, Pavlov, Killing Floor 2, and Back 4 Blood. We matched them by the tags players give ZomDay on Steam (Zombies, Violent, Gore, Action, and Indie): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Zombies · Action · Shooter

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

Pavlov
Shared: VR · Zombies · Action

Killing Floor 2
Shared: Zombies · Gore · Action

Back 4 Blood
Shared: Zombies · Gore · Action

DOOM Eternal
Shared: Gore · Action · Violent

Resident Evil 7 Biohazard
Shared: VR · Zombies · Gore

Killing Floor
Shared: Zombies · Action · Violent

Arizona Sunshine® VR Legacy
Shared: VR · Zombies · Action

Dying Light
Shared: Zombies · Horror · Gore

Resident Evil Village
Shared: Zombies · Action · Horror

Dead Effect 2 VR
Shared: VR · Zombies · Action

DOOM
Shared: Gore · Action · Shooter

Resident Evil 2
Shared: Zombies · Gore · Horror

Trepang2
Shared: Gore · Violent · Shooter

Dying Light: The Beast
Shared: Zombies · Action · Horror

Resident Evil 3
Shared: Zombies · Action · Horror

My Friend Pedro
Shared: Action · Gore · Indie

Left 4 Dead
Shared: Zombies · Action · Shooter

DayZ
Shared: Zombies · Shooter · Post-apocalyptic

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

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

The Walking Dead Onslaught
Shared: VR · Zombies · Action

Resident Evil 4
Shared: Action · Zombies · Horror