Games like No Plan Z!
Games like No Plan Z! include Door Kickers, Door Kickers 2: Task Force North, Plague Inc: Evolved, No Plan B, and Breach & Clear. We matched them by the tags players give No Plan Z! on Steam (Strategy, Singleplayer, Indie, Simulation, and Action): closest matches first, and among equally close ones the better-known games.

Door Kickers
Shared: Strategy · Simulation · Indie

Door Kickers 2: Task Force North
Shared: Top-Down · Strategy · Action

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

No Plan B
Shared: Strategy · Indie · Simulation

Breach & Clear
Shared: Strategy · Simulation · Singleplayer

FTL: Faster Than Light
Shared: Strategy · Indie · Singleplayer

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

Total War: THREE KINGDOMS
Shared: Strategy · Singleplayer · Military

Arma 3
Shared: Action · Military · Simulation

HighFleet
Shared: Singleplayer · Strategy · Indie

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Singleplayer · Indie

XCOM 2
Shared: Strategy · Singleplayer · Tactical

911 Operator
Shared: Strategy · Simulation · Singleplayer

Aliens: Dark Descent
Shared: Strategy · Action · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Singleplayer

The Escapists
Shared: Strategy · Singleplayer · Simulation

The Last Spell
Shared: Strategy · Singleplayer · Tactical

DEFCON
Shared: Strategy · Singleplayer · Simulation

Arma Reforger
Shared: Simulation · Military · Strategy

Call to Arms
Shared: Strategy · Action · Military

Steel Division 2
Shared: Strategy · Singleplayer · Simulation

Phantom Brigade
Shared: Simulation · Strategy · Turn-Based Tactics

Game Dev Tycoon
Shared: Strategy · Indie · Simulation

Sea Power : Naval Combat in the Missile Age
Shared: Strategy · Simulation · Singleplayer