Games like Monster Showdown
Games like Monster Showdown include Left 4 Dead 2, Killing Floor 3, PUBG: BATTLEGROUNDS, Call of Duty: World at War, and Call of Duty®: Black Ops III. We matched them by the tags players give Monster Showdown on Steam (FPS, PvE, Action, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: FPS · Shooter · Action

Killing Floor 3
Shared: FPS · PvE · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action

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

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

Deep Rock Galactic
Shared: PvE · FPS · Shooter

Call of Duty®
Shared: FPS · Shooter · Action

Call of Duty®: Black Ops
Shared: FPS · Action · Shooter

Battlefield™ 2042
Shared: FPS · Shooter · Action

Battlefield™ V
Shared: FPS · Shooter · First-Person

Half-Life 2
Shared: FPS · Action · Shooter

Starship Troopers: Extermination
Shared: FPS · Action · First-Person

BioShock Infinite
Shared: Action · FPS · Shooter

Apex Legends™
Shared: FPS · Shooter · Action

Back 4 Blood
Shared: FPS · Shooter · Action

Black Mesa
Shared: FPS · Action · Shooter

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

Enlisted
Shared: FPS · Action · Shooter

DOOM
Shared: FPS · Action · Shooter

Aimlabs
Shared: FPS · Shooter · Action

Counter-Strike: Source
Shared: FPS · Shooter · Action

Titanfall® 2
Shared: FPS · Shooter · Action

RoboCop: Rogue City
Shared: FPS · Action · Shooter

MULLET MADJACK
Shared: FPS · Action · Arcade