Games like Political Arena
Games like Political Arena include Mount & Blade II: Bannerlord, Crusader Kings III, Crusader Kings II, Kenshi, and The Scroll of Taiwu : Beyond The Dome. We matched them by the tags players give Political Arena on Steam (Strategy, RPG, Simulation, Sandbox, and Strategy RPG): closest matches first, and among equally close ones the better-known games.

Mount & Blade II: Bannerlord
Shared: Strategy · RPG · Sandbox

Crusader Kings III
Shared: Strategy · Simulation · RPG

Crusader Kings II
Shared: Strategy · Simulation · RPG

Kenshi
Shared: RPG · Sandbox · Strategy RPG

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Sandbox · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Strategy

Baldur's Gate 3
Shared: RPG · Character Customization · Choices Matter

Cities: Skylines
Shared: Simulation · Strategy · Sandbox

鬼谷八荒 Tale of Immortal
Shared: Simulation · RPG · Sandbox

Mount & Blade: Warband
Shared: RPG · Strategy · Sandbox

Amazing Cultivation Simulator
Shared: Simulation · RPG · Strategy

Tropico 6
Shared: Strategy · Simulation · Sandbox

Cities: Skylines II
Shared: Simulation · Sandbox · Strategy

Elin
Shared: RPG · Character Customization · Sandbox

觅长生
Shared: RPG · Strategy · Simulation

RimWorld
Shared: Strategy · Sandbox · Simulation

Total War: WARHAMMER
Shared: Strategy · RPG · Simulation

Sands of Salzaar
Shared: RPG · Strategy · Sandbox

Beholder
Shared: Strategy · Choices Matter · Political Sim

The Sims™ 3
Shared: Simulation · Sandbox · Character Customization

Pathfinder: Kingmaker - Enhanced Plus Edition
Shared: RPG · Character Customization · Strategy RPG

Planet Coaster
Shared: Simulation · Sandbox · Strategy

龙胤立志传
Shared: RPG · Simulation · Strategy RPG

inZOI
Shared: Simulation · Character Customization · Sandbox