Games like Warfare 1944
Games like Warfare 1944 include Squad 44, PUBG: BATTLEGROUNDS, Arma 3, Total Tank Simulator, and KovaaK's. We matched them by the tags players give Warfare 1944 on Steam (Action, Early Access, Indie, Strategy, and Simulation): closest matches first, and among equally close ones the better-known games.

Squad 44
Shared: World War II · Simulation · FPS

PUBG: BATTLEGROUNDS
Shared: Action · Multiplayer · FPS

Arma 3
Shared: Action · Simulation · Multiplayer

Total Tank Simulator
Shared: Action · Strategy · Simulation

KovaaK's
Shared: Action · Indie · Simulation

WARDOGS
Shared: Action · FPS · Multiplayer

Hell Let Loose
Shared: World War II · Action · Multiplayer

Bodycam
Shared: FPS · Multiplayer · Simulation

Arma Reforger
Shared: Simulation · Action · Strategy

War of Rights
Shared: Action · Multiplayer · Simulation

Who's Your Daddy?!
Shared: Multiplayer · Simulation · Strategy

Sub Rosa
Shared: Action · Early Access · Multiplayer

EmergeNYC
Shared: Early Access · Action · Simulation

Feed and Grow: Fish
Shared: Simulation · Early Access · Action

Day of Infamy
Shared: World War II · Action · Multiplayer

Insurgency
Shared: Action · FPS · Multiplayer

Schedule I
Shared: Simulation · Multiplayer · Action

Men of War: Assault Squad 2
Shared: Strategy · Action · World War II

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

Counter-Strike
Shared: Action · Multiplayer · FPS

Enlisted
Shared: Action · World War II · FPS

Takedown: Red Sabre
Shared: Action · Strategy · Simulation

Freeman: Guerrilla Warfare
Shared: Action · Strategy · FPS

Mount & Blade II: Bannerlord
Shared: Strategy · Action · Multiplayer