Games like Sigma Theory: Global Cold War
Games like Sigma Theory: Global Cold War include Sid Meier’s Civilization® VI, Age of History II, Democracy 3, Imperator: Rome, and Heroes of Might and Magic: Olden Era. We matched them by the tags players give Sigma Theory: Global Cold War on Steam (Political Sim, Turn-Based, Management, Turn-Based Strategy, and Grand Strategy): closest matches first, and among equally close ones the better-known games.

Sid Meier’s Civilization® VI
Shared: Turn-Based Strategy · Strategy · Turn-Based

Age of History II
Shared: Political Sim · Strategy · Turn-Based Strategy

Democracy 3
Shared: Political Sim · Turn-Based · Strategy

Imperator: Rome
Shared: Grand Strategy · Political Sim · Strategy

Heroes of Might and Magic: Olden Era
Shared: Turn-Based Strategy · Strategy · Grand Strategy

Victoria 3
Shared: Political Sim · Grand Strategy · Strategy

Victoria II
Shared: Political Sim · Grand Strategy · Strategy

Terra Invicta
Shared: Grand Strategy · Strategy · Management

Sid Meier's Civilization® V
Shared: Turn-Based · Turn-Based Strategy · Strategy

Old World
Shared: Strategy · Grand Strategy · Turn-Based Strategy

Total War: THREE KINGDOMS
Shared: Turn-Based Strategy · Strategy · Grand Strategy

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

Crusader Kings III
Shared: Grand Strategy · Strategy · Management

Total War: WARHAMMER II
Shared: Turn-Based Strategy · Strategy · Grand Strategy

ENDLESS Legend™ 2
Shared: Grand Strategy · Strategy · Turn-Based Strategy

HUMANKIND™
Shared: Turn-Based Strategy · Strategy · Management

Cities: Skylines
Shared: Management · Sandbox · Strategy

Crusader Kings II
Shared: Political Sim · Grand Strategy · Strategy

Tropico 6
Shared: Political Sim · Management · Strategy

Total War: MEDIEVAL II – Definitive Edition
Shared: Turn-Based Strategy · Strategy · Grand Strategy

Manor Lords
Shared: Strategy · Grand Strategy · Management

Democracy 4
Shared: Political Sim · Management · Strategy

Battle Brothers
Shared: Turn-Based Strategy · Strategy · Grand Strategy

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