Welcome to alien infested planet! In campaign mode, missions range from offense to defense missions upon which you can build a base to stop the alien horde. Or there is a survival mode with 6 maps, where you destroy wave after wave of incoming aliens.
Your base is under attack! Get your best chopper out there immediately and demolish every enemy unit on sight. Don't forget to build towers and repair damaged towers to help accomplish your mission.
Defend the Earth from invading UFOs. Aliens are invading our earth and it is up to you to defend an important nuclear factory. Buy cannons, train new defenders and tell them what to do.
