Extraterrestrial spacecraft to attack the Earth ,to build a strong national defense and stop them. Your task is to build a strong defense system to save the planet and the survival of the strong wave of alien attack 40. Use the mouse to control the game. use 5 bullet towers, upgrade to max, then 6 freeze, upgrade max and at last build the ultra tower, max score at medium.
Highscore is not available for this game, you can play and submit your score with our