Pixel Gun is a challenging, action packed shooting game in which you have to defend your space station from the invaders. You have a limited amount of ammunition which will get depleted as you continue to fight off waves of aliens. They are fast moving and can reach you very quickly. Aim your gun at their weak points, and fire when they appear. When all the alien troops are defeated, the next wave will arrive, making it important to save your space ship before it is shot down. In this challenging game that has many levels, there are also many upgrades, weapons, and power ups available.