Invade cities and overwhelm the human population in Alienocalypse! Before you begin each level, you will have to choose which and how many units to take into battle. Each unit costs DNA points, which are displayed at the bottom of the screen. In each level, you have to strategically drop eggs on the battlefield, which will then hatch and attack any human or vehicle it comes into contact with. Kill and destroy all units to complete the level and gain evolution points. Evolution points are used to buy new units or upgrade units that you have already unlocked.