Games like Europa Universalis III Complete
Games like Europa Universalis III Complete include Crusader Kings II, Hearts of Iron IV, Age of History II, Victoria II, and Imperator: Rome. We matched them by the tags players give Europa Universalis III Complete on Steam (Grand Strategy, Strategy, Historical, Political Sim, and Real-Time with Pause): closest matches first, and among equally close ones the better-known games.

Crusader Kings II
Shared: Grand Strategy · Strategy · Historical

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

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

Victoria II
Shared: Grand Strategy · Strategy · Historical

Imperator: Rome
Shared: Grand Strategy · Strategy · Historical

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · Historical

Europa Universalis IV
Shared: Grand Strategy · Strategy · Historical

Crusader Kings III
Shared: Strategy · Grand Strategy · Historical

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

Stellaris
Shared: Strategy · Grand Strategy · Sandbox

Sid Meier's Civilization® V
Shared: Strategy · Historical · Grand Strategy

Victoria 3
Shared: Strategy · Grand Strategy · Political Sim

Total War: MEDIEVAL II – Definitive Edition
Shared: Strategy · Historical · Grand Strategy

Total War: ROME II - Emperor Edition
Shared: Strategy · Historical · Grand Strategy

Sid Meier's Civilization VII
Shared: Grand Strategy · Strategy · Historical

Total War: ATTILA
Shared: Strategy · Historical · Grand Strategy

Knights of Honor II: Sovereign
Shared: Strategy · Grand Strategy · Historical

Hearts of Iron III
Shared: Grand Strategy · Strategy · Historical

Total War: NAPOLEON – Definitive Edition
Shared: Strategy · Grand Strategy · Historical

Europa Universalis V
Shared: Grand Strategy · Strategy · Historical

NEBULOUS: Fleet Command
Shared: Strategy · Grand Strategy · Simulation

Rebel Inc: Escalation
Shared: Strategy · Grand Strategy · Historical

Terra Invicta
Shared: Strategy · Grand Strategy · Historical

Manor Lords
Shared: Strategy · Grand Strategy · Historical