Games like Zombie City Together
Games like Zombie City Together include Left 4 Dead 2, PUBG: BATTLEGROUNDS, DayZ, Back 4 Blood, and Left 4 Dead. We matched them by the tags players give Zombie City Together on Steam (Zombies, Online Co-Op, Action, FPS, and Survival): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Zombies · FPS · Co-op

PUBG: BATTLEGROUNDS
Shared: Survival · FPS · Shooter

DayZ
Shared: Zombies · Online Co-Op · Survival

Back 4 Blood
Shared: Zombies · Online Co-Op · FPS

Left 4 Dead
Shared: Zombies · Co-op · FPS

Killing Floor 2
Shared: Zombies · Online Co-Op · FPS

Dying Light
Shared: Zombies · Online Co-Op · Survival

World War Z
Shared: Zombies · Online Co-Op · Action

No More Room in Hell 2
Shared: Zombies · Online Co-Op · Co-op

Killing Floor
Shared: Zombies · FPS · Co-op

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

PAYDAY 2
Shared: Action · Co-op · FPS

7 Days to Die
Shared: Zombies · Survival · Online Co-Op

Call of Duty®
Shared: FPS · Action · Shooter

Call of Duty: World at War
Shared: Zombies · FPS · Action

Apex Legends™
Shared: FPS · Action · Multiplayer

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

Delta Force
Shared: FPS · Online Co-Op · Action

How to Fish
Shared: Online Co-Op · Co-op · Multiplayer

Rust
Shared: Survival · Multiplayer · PvP

GTFO
Shared: Online Co-Op · FPS · Co-op

Paladins®
Shared: FPS · Action · Multiplayer

Call of Duty®: Modern Warfare® 2 (2009)
Shared: Action · FPS · Shooter

ARC Raiders
Shared: Online Co-Op · PvP · Multiplayer