Games like Countryballs: Power Protocol
Games like Countryballs: Power Protocol include Hearts of Iron IV, Totally Accurate Battle Simulator, Banana, Mount & Blade II: Bannerlord, and Plebby Quest: The Crusades. We matched them by the tags players give Countryballs: Power Protocol on Steam (Casual, Strategy, Simulation, Grand Strategy, and Idler): closest matches first, and among equally close ones the better-known games.

Hearts of Iron IV
Shared: Strategy · Grand Strategy · War

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · War

Banana
Shared: Casual · Idler · Simulation

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

Plebby Quest: The Crusades
Shared: Casual · Strategy · Simulation

Russian Life Simulator
Shared: Simulation · Strategy · Casual

Game Dev Tycoon
Shared: Simulation · Strategy · Casual

Idle Champions of the Forgotten Realms
Shared: Strategy · Idler · Adventure

Total War: THREE KINGDOMS
Shared: Strategy · Grand Strategy · War

Cookie Clicker
Shared: Casual · Idler · Strategy

Dictators:No Peace Countryballs
Shared: Strategy · Simulation · Casual

Dragon Cliff
Shared: Strategy · Idler · Casual

Crusader Kings III
Shared: Strategy · Simulation · Grand Strategy

Plague Inc: Evolved
Shared: Strategy · Simulation · Casual

Shieldwall
Shared: Simulation · Strategy · Action

DAVE THE DIVER
Shared: Casual · Adventure · Simulation

The Escapists
Shared: Strategy · Simulation · Action

Melvor Idle
Shared: Casual · Idler · Adventure

Nodebuster
Shared: Casual · Strategy · Simulation

Age of History II
Shared: Strategy · Grand Strategy · Simulation

Total War: WARHAMMER II
Shared: Strategy · Grand Strategy · War

Kingdom Rush - Tower Defense
Shared: Strategy · Casual · Action

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

Arma 3
Shared: Simulation · Action · Military