AttackUFO is a shooter game in which you controls a laser cannon by moving it horizontally and firing at aliens. There're three game modes in it (classic, power up, and challenge).

In the classic mode, the alien attempt to destroy your cannon by firing at it while they approach the earth. If they reach the earth, the alien invasion is successful and the game ends. A special UFO will occasionally move across the top of screen and award bonus points if destroyed. The laser cannon is partially protected by several stationary defense bunkers, and the bunkers are gradually destroyed by missiles from the aliens and your cannon.

In the power up mode, your canon can fire more missiles at the same time and move more smoothly. However, the aliens come more quickly and their missiles upgraded too. This mode is more fun and difficult than the classic mode. Try to get your highest score and updated it to Game Center to locate your position in the world.

In challenge mode, there're 30 well-designed levels from the easiest to the hardest level.

With the smooth joy stick controller, your cannon control is very easy and accurate. So now download it and start to protect the earth with your cannon!