Games like Zulu Response
Games like Zulu Response include War of Rights, Hell Let Loose: Vietnam, Mount & Blade II: Bannerlord, Holdfast: Nations At War, and Arma 3. We matched them by the tags players give Zulu Response on Steam (Strategy, Action, Indie, Simulation, and Violent): closest matches first, and among equally close ones the better-known games.

War of Rights
Shared: Action · Historical · Multiplayer

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

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

Holdfast: Nations At War
Shared: Multiplayer · Action · Historical

Arma 3
Shared: Action · Simulation · Multiplayer

Squad 44
Shared: Simulation · FPS · Multiplayer

KovaaK's
Shared: Action · Simulation · Indie

Arma Reforger
Shared: Simulation · Action · Strategy

Easy Red
Shared: Action · Indie · Strategy

Gallipoli
Shared: Simulation · Strategy · Multiplayer

Shieldwall
Shared: Action · Strategy · Simulation

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

WARDOGS
Shared: Action · Multiplayer · FPS

Total Tank Simulator
Shared: Strategy · Action · Simulation

RIOT: Civil Unrest
Shared: Strategy · Indie · Simulation

Onward
Shared: Action · Simulation · FPS

Sid Meier’s Civilization® VI
Shared: Strategy · Multiplayer · Historical

Contractors
Shared: Action · Indie · Violent

SMITE®
Shared: Action · Strategy · Multiplayer

PUBG: BATTLEGROUNDS
Shared: Multiplayer · Action · FPS

Chivalry: Medieval Warfare
Shared: Action · Multiplayer · Violent

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

A Total War Saga: TROY
Shared: Strategy · Simulation · Action

Angels Fall First
Shared: Action · Indie · FPS