A variation of Space Invaders (not Defender) that was released by Magna Media/64'er in 1994, and coded by Jan Zimmerman. It differs in Space Invaders in several ways, one of which is power-ups. During the game large colored balls falls from the sky and land on the ground (if they don't land on you first) These balls represent several power-ups

red ball = higher shot frequency
violet ball = double shot power
green ball = super shot
blue ball = slower energy-downcounter
orange ball = destroys all aliens currently on the screen
brown ball = builds up wall/barrier
light-blue ball = faster shot
light-red ball = takes away wall