Games like Operation: Harsh Doorstop
Games like Operation: Harsh Doorstop include Arma 3, Counter-Strike 2, Call of Duty®, Hell Let Loose, and Squad. We matched them by the tags players give Operation: Harsh Doorstop on Steam (Free to Play, Military, Realistic, FPS, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Arma 3
Shared: Military · Multiplayer · Realistic

Counter-Strike 2
Shared: FPS · Multiplayer · Shooter

Call of Duty®
Shared: FPS · Multiplayer · Military

Hell Let Loose
Shared: Realistic · Shooter · Multiplayer

Squad
Shared: Military · Realistic · FPS

Battlefield™ 6
Shared: Military · FPS · Multiplayer

Insurgency
Shared: Realistic · FPS · Multiplayer

Insurgency: Sandstorm
Shared: Realistic · FPS · Military

WARDOGS
Shared: Military · FPS · Multiplayer

Arma Reforger
Shared: Military · Realistic · FPS

Tom Clancy's Rainbow Six Siege
Shared: FPS · Multiplayer · Shooter

GROUND BRANCH
Shared: Military · Realistic · FPS

Bodycam
Shared: Realistic · FPS · Military

Ready or Not
Shared: Realistic · FPS · Tactical

Apex Legends™
Shared: Free to Play · Multiplayer · FPS

Battlefield™ 2042
Shared: FPS · Military · Multiplayer

Ravenfield
Shared: FPS · Military · Shooter

Battlefield™ REDSEC
Shared: Free to Play · FPS · Multiplayer

Arena Breakout: Infinite
Shared: Free to Play · FPS · Realistic

Day of Infamy
Shared: FPS · Realistic · Multiplayer

Zero Hour
Shared: Realistic · FPS · Shooter

Delta Force
Shared: Free to Play · FPS · Multiplayer

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

Arma 2: Operation Arrowhead
Shared: Military · Multiplayer · Realistic