Games like War in the Gulf
Games like War in the Gulf include Arma Reforger, Arma 3, Call to Arms, PUBG: BATTLEGROUNDS, and Men of War: Assault Squad 2. We matched them by the tags players give War in the Gulf on Steam (Simulation, Strategy, Action, RTS, and Shooter): closest matches first, and among equally close ones the better-known games.

Arma Reforger
Shared: Simulation · Shooter · Action

Arma 3
Shared: Action · Simulation · Shooter

Call to Arms
Shared: Strategy · Action · RTS

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS

Men of War: Assault Squad 2
Shared: Strategy · Simulation · RTS

Hell Let Loose: Vietnam
Shared: Simulation · Action · Strategy

Aimlabs
Shared: Simulation · Action · Shooter

Call of Duty®
Shared: Action · Shooter · FPS

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

Ravenfield
Shared: FPS · Shooter · Action

Arma 2: Operation Arrowhead
Shared: Simulation · Action · Strategy

Freeman: Guerrilla Warfare
Shared: Strategy · Action · Shooter

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · RTS · Real Time Tactics

Insurgency
Shared: FPS · Action · Shooter

Hell Let Loose
Shared: Shooter · Action · FPS

Call of Duty®: Modern Warfare® II
Shared: Action · Shooter · FPS

Battlefield™ 2042
Shared: Shooter · FPS · Action

Holdfast: Nations At War
Shared: Shooter · Action · FPS

Insurgency: Sandstorm
Shared: Shooter · FPS · Action

Zero Hour
Shared: Shooter · Action · FPS

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Third-Person Shooter

Counter-Strike
Shared: Action · Shooter · FPS

KovaaK's
Shared: Simulation · Action · Shooter

Bodycam
Shared: FPS · Shooter · Simulation