Defend the space carrier with a turret by gunning down as many enemy spaceships as possible. Get additional help by sending out carrier fighters of your own.
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.
Alice again faces overwhelming packs of alien predators reinforced by new frightful crossbred combat species. Kill all the aliens and destroy their hives!