Games like Supreme Ruler Ultimate
Games like Supreme Ruler Ultimate include Hearts of Iron IV, Steel Division 2, Europa Universalis IV, Company of Heroes 2, and Total War: THREE KINGDOMS. We matched them by the tags players give Supreme Ruler Ultimate on Steam (Grand Strategy, Tactical, Military, RTS, and Modern): closest matches first, and among equally close ones the better-known games.

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

Steel Division 2
Shared: RTS · Military · Strategy

Europa Universalis IV
Shared: Grand Strategy · Strategy · Military

Company of Heroes 2
Shared: RTS · Tactical · Strategy

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

Victoria II
Shared: Grand Strategy · Strategy · Military

Wargame: Red Dragon
Shared: Military · RTS · Tactical

Men of War: Assault Squad 2
Shared: RTS · Tactical · Strategy

Age of History 3
Shared: Grand Strategy · Wargame · RTS

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

NEBULOUS: Fleet Command
Shared: Grand Strategy · Military · Tactical

Total War: EMPIRE – Definitive Edition
Shared: Grand Strategy · Military · Tactical

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

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

Broken Arrow
Shared: RTS · Modern · Wargame

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

Steel Division: Normandy 44
Shared: Military · RTS · Tactical

Crusader Kings II
Shared: Grand Strategy · Strategy · Simulation

Call to Arms
Shared: Military · RTS · Strategy

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

WARNO
Shared: Military · Wargame · RTS

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

Terra Invicta
Shared: Grand Strategy · Strategy · Tactical

Darkest Hour: A Hearts of Iron Game
Shared: Grand Strategy · Strategy · Military