Games like Zombardment
Games like Zombardment include CS2D, Escape From Duckov, Left 4 Dead 2, SAS: Zombie Assault 4, and The Last Stand: Aftermath. We matched them by the tags players give Zombardment on Steam (Shooter, Looter Shooter, Zombies, Survival, and Roguelike): closest matches first, and among equally close ones the better-known games.
CS2D
Shared: Shooter · 2D · Zombies
Escape From Duckov
Shared: Looter Shooter · Shooter · Action
Left 4 Dead 2
Shared: Zombies · Shooter · Survival
SAS: Zombie Assault 4
Shared: Zombies · Shooter · Top-Down Shooter
The Last Stand: Aftermath
Shared: Zombies · Survival · Shooter
ZERO Sievert
Shared: Looter Shooter · Survival · Shooter
Risk of Rain 2
Shared: Roguelike · Looter Shooter · Shooter
BALL x PIT
Shared: Roguelike · Action · Shoot 'Em Up
DayZ
Shared: Survival · Zombies · Shooter
Death Road to Canada
Shared: Zombies · Survival · Roguelike
Nuclear Throne
Shared: Roguelike · Action · Shooter
Yet Another Zombie Survivors
Shared: Zombies · Top-Down Shooter · Roguelike
20 Minutes Till Dawn
Shared: Survival · Shoot 'Em Up · Top-Down Shooter
PUBG: BATTLEGROUNDS
Shared: Shooter · Survival · Action
Vampire Survivors
Shared: 2D · Roguelike · Pixel Graphics
Skul: The Hero Slayer
Shared: Roguelike · Action · 2D
Chicken Invaders Universe
Shared: Shooter · Shoot 'Em Up · Top-Down Shooter
Megabonk
Shared: Roguelike · Survival · Action
The Final Station
Shared: Survival · Zombies · 2D
Relic Hunters Zero: Remix
Shared: Looter Shooter · Top-Down Shooter · Action
Gunfire Reborn
Shared: Roguelike · Looter Shooter · Shooter
Enter the Gungeon
Shared: Roguelike · Pixel Graphics · 2D
FatalZone
Shared: Zombies · Survival · Top-Down Shooter
The Binding of Isaac: Rebirth
Shared: Roguelike · Indie · 2D