Games like Sigma Theory

Here are some great alternatives to Sigma Theory by Plug In Digital :
MechCom 3 - 3D RTS
MechCom 3 - 3D RTS
★3.9
Conflict of Nations: WW3
Conflict of Nations: WW3
★4.5
Strategy&Tactics 2: WWII
Strategy&Tactics 2: WWII
★4.2
War Strategy & Conflict: WW3
War Strategy & Conflict: WW3
★3.7
Diamant Rose
Diamant Rose
★4.1
RISK: Global Domination
RISK: Global Domination
★4.4
Space Takeover: Over City
Space Takeover: Over City
★4.2
Latin America Empire
Latin America Empire
★4.1
World Empire
World Empire
★4.2
Asia Empire
Asia Empire
★4.3
Africa Empire
Africa Empire
★4.3
Middle East Empire
Middle East Empire
★4.2
Secret Agent Elite Spy Mission
Secret Agent Elite Spy Mission
★3.5
Planet Fights
Planet Fights
★3.5
Nuclear War 2
Nuclear War 2
★3.9
Call of War: Frontlines
Call of War: Frontlines
★4.5