Games like Polity Painter
Games like Polity Painter include Ages of Conflict: World War Simulator, SPORE™, Doodle Empires, WorldBox - God Simulator, and Europa Universalis IV. We matched them by the tags players give Polity Painter on Steam (Software, God Game, Sandbox, Simulation, and Education): closest matches first, and among equally close ones the better-known games.

Ages of Conflict: World War Simulator
Shared: God Game · Sandbox · Simulation

SPORE™
Shared: God Game · Sandbox · Simulation

Doodle Empires
Shared: Simulation · Sandbox · God Game

WorldBox - God Simulator
Shared: God Game · Sandbox · Simulation

Europa Universalis IV
Shared: Simulation · Historical · Alternate History

Ultimate Epic Battle Simulator 2
Shared: Sandbox · Simulation · God Game

Age of History II
Shared: Historical · Political Sim · Simulation

Reus
Shared: God Game · Simulation · Sandbox

Universe Sandbox
Shared: Sandbox · Simulation · God Game

Crusader Kings II
Shared: Simulation · Political Sim · Sandbox

Fantasy Map Simulator
Shared: God Game · Sandbox · Alternate History

Kerbal Space Program
Shared: Sandbox · Simulation · Education

Democracy 3
Shared: Simulation · Political Sim · Sandbox

Totally Accurate Battle Simulator
Shared: Sandbox · Simulation · Strategy

Victoria II
Shared: Simulation · Political Sim · Historical

Universe Sandbox
Shared: Sandbox · Simulation · Education

Sand:box
Shared: Sandbox · Simulation · God Game

Game Dev Tycoon
Shared: Simulation · Sandbox · 2D

Prison Architect
Shared: Simulation · Sandbox · 2D

Victoria 3
Shared: Simulation · Political Sim · Historical

Hearts of Iron IV
Shared: Historical · Simulation · Alternate History

House Flipper
Shared: Simulation · Sandbox · Education

Ultimate Arena
Shared: God Game · Sandbox · Alternate History

PC Building Simulator
Shared: Simulation · Education · Sandbox