Games like Necro Defense
Games like Necro Defense include War Thunder, Men of War: Assault Squad 2, Hell Let Loose: Vietnam, Arma 3, and Mount & Blade II: Bannerlord. We matched them by the tags players give Necro Defense on Steam (Strategy, Action, and Simulation): closest matches first, and among equally close ones the better-known games.

War Thunder
Shared: Action · Simulation · VR

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

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

Arma 3
Shared: Action · Simulation · Strategy

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

Total Tank Simulator
Shared: Strategy · Action · Simulation

Arma Reforger
Shared: Simulation · Action · Strategy

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

Shieldwall
Shared: Action · Simulation · Strategy

We Who Are About To Die
Shared: Action · Strategy · Simulation

Police Stories
Shared: Strategy · Action · Simulation

Your Only Move Is HUSTLE
Shared: Action · Strategy · Simulation

Ultimate Epic Battle Simulator 2
Shared: Strategy · Simulation · Action

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Action

Call to Arms
Shared: Strategy · Action · Simulation

Ultimate Epic Battle Simulator
Shared: Simulation · Strategy · Action

I Expect You To Die
Shared: Strategy · VR · Action

Jurassic World Evolution 3
Shared: Strategy · Simulation · Action

Onward
Shared: VR · Simulation · Action

Door Kickers
Shared: Strategy · Simulation · Action

BONEWORKS
Shared: Action · VR · Simulation

House of the Dying Sun
Shared: Action · Simulation · VR

SMITE®
Shared: Action · Strategy · Simulation

Planet Coaster
Shared: Simulation · Strategy · Action