In Alien Slayer 3D aliens are trying to take over the earth and you’re our last line of defense! Slay all the aliens and their eggs before they populate earth. This is a supa sweet 1st person shooter. Think DOOM for flash. There are no more reinforcements. You’re the last line of defense. If you want to try some other shoot ’em up games you can play the space game Azul Baronis, or the shooting Storm the House 2, or Destructo Tanks.