Blast all the aliens before they land!
Pull back and launch your plasma balls at the attacking alien spaceships.
Tap the Power Ups to multiply points, get extra lives, or zap all the ships on the screen and earn big points!
Compete against your friends and others around the world by using the Game Center leaderboard.
This is the free version of our wildly popular full version. The paid version includes several extras like a x10 Power Up and earned Ranks based on your scores.
** This FREE game has NO in-app purchases. **