Place towers to attack invading aliens and shoot them until they go splat! There are four different kinds of towers as well as bonus bombs that you can drop if things get too hectic. Use your mouse to buy towers, place them strategically and then upgrade them as you earn more money. Take out all the aliens one each level to move to the next. Have some wonderful fun playing Defense of World UFO!
Surfnetkids »
Games » Shooting Games » Defense of World UFO