Games like Supreme Ruler Global Outbreak
Games like Supreme Ruler Global Outbreak include Plague Inc: Evolved, Infection Free Zone, Quarantine Zone: The Last Check, This War of Mine, and Project Zomboid. We matched them by the tags players give Supreme Ruler Global Outbreak on Steam (Zombies, Singleplayer, Simulation, Strategy, and Outbreak Sim): closest matches first, and among equally close ones the better-known games.

Plague Inc: Evolved
Shared: Simulation · Strategy · Singleplayer

Infection Free Zone
Shared: Zombies · Post-apocalyptic · Strategy

Quarantine Zone: The Last Check
Shared: Zombies · Simulation · Singleplayer

This War of Mine
Shared: Singleplayer · Survival · Strategy

Project Zomboid
Shared: Zombies · Survival · Post-apocalyptic

They Are Billions
Shared: Zombies · Strategy · Survival

Plants vs. Zombies GOTY Edition
Shared: Zombies · Singleplayer · Strategy

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

Frostpunk 2
Shared: Strategy · Simulation · Singleplayer

Frostpunk
Shared: Strategy · Survival · Post-apocalyptic

Crusader Kings II
Shared: Strategy · Simulation · Grand Strategy

Cepheus Protocol
Shared: Zombies · Post-apocalyptic · Strategy

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

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

7 Days to Die
Shared: Zombies · Survival · Post-apocalyptic

RimWorld
Shared: Strategy · Singleplayer · Survival

Days Gone
Shared: Zombies · Singleplayer · Post-apocalyptic

Organ Trail: Director's Cut
Shared: Zombies · Strategy · Singleplayer

Steel Division 2
Shared: Strategy · Singleplayer · Simulation

Imperator: Rome
Shared: Strategy · Simulation · Singleplayer

Banished
Shared: Simulation · Strategy · Singleplayer

Door Kickers
Shared: Strategy · Simulation · Singleplayer

Victoria II
Shared: Strategy · Simulation · Grand Strategy

Oxygen Not Included
Shared: Singleplayer · Survival · Simulation