Colony Siege — a hybrid of strategy, survival and real-time tower defense. Fight in a wide variety of environments to defend the last human colonies from two unique threats. Survive alone or with a friend in a non-linear campaign. Defend yourself with powerful towers that automatically form walls when placed next to each other. Use unique traps to slow down, stun, burn, or bombard your enemy. Build and manage mobile ground squads. Hit the enemy with satellite attacks, long-range missiles, commander abilities, and fighter sorties. You should expect a constant change of landscapes as you travel to different planets, moons, space stations and huge mobile space platforms.