Many people have a morbid fear of aliens and other creatures that they cannot understand. If you remember the tales of dragons, vampires and other creatures that sent fear down the spine of even the bravest of soldiers, you will see that there is a great capacity for a few to stand up to these creatures. The world has experienced an attack from aliens and they have set up five camps in America. You approach your military supremo and ask for permission to take a few brave souls and go face this extraterrestrial menace. Your commander sees no harm, if you can spare your life, and the lives of those who will follow you, in an effort to save the planet. The only problem is that you are living in the medieval period when the best weapons are the cannons. You take your men and trundle off, with your cannon in tow, until you reach the first tower. You take a look at the structure and see that this base was not very well protected, so you take an easy shot and destroy the alien. However, as you move to other levels, you will find the bases well prepared. This means that you will have to take a look at their defenses and see where the chinks are. It is by taking a look at these defenses that you will be able to know where you can hit the aliens hardest using the least amount of ammunition. When you kill the aliens with one shot, you will get a gold medal; two shots, a silver and three shots, a bronze. If you use more than three shots, then you will not be as effective and you will not earn any medals. You may repeat the level again if you would like to redeem yourself.