HomeGamesStrategySigma TheoryGames like Sigma Theory Here are some great alternatives to Sigma Theory by Plug In Digital : MechCom 3 - 3D RTS ★3.9 Conflict of Nations: WW3 ★4.4 Strategy&Tactics 2: WWII ★4.1 Diamant Rose ★4.1 RISK: Global Domination ★4.4 Space Takeover: Over City ★4.3 Blacklist: Special Ops Shooter ★4.1 World Empire ★4.3 Latin America Empire ★4.1 Middle East Empire ★4.2 Asia Empire ★4.3 Africa Empire ★4.3 MA 1 – President Simulator ★4.2 Planet Fights ★3.5 Nuclear War 2 ★3.9 Age of Warpath: Global Warzone ★3.5