Summary: I got this "Shooter" quadrilogy on special for 5bux a while ago and this game is the best of them. There's loads of character customization with room for multiple playthroughs depending on how you build your BALD.
Summary: There's Aliens. You shoot them. The title is very apt. However, you shoot a LOT of aliens in a LOT of different ways, it is always accessible yet challenging, and the graphics are simple, yet it works for what it is.