iSiege: Nuclear Option features single player, multiplayer, and pass n’ play modes with several difficulty modes. Take turns as you try to destroy the opposing side’s capitol with tanks, troops and ICBMs. Defend yourself with countermeasures when things get tough. Score bonuses and unlock challenges in Gamecenter by scoring combos, destroying enemy forces, and precision Nuclear Strikes. Track your scores against your friends and the world as you play for world dominance!