Download Alien Swarm
Alien Swarm is a 3D shooter with a sci-fi theme. The thing that makes this shooter different from others is that you watch the whole thing from a top down view. The world where the game takes place is alien infested, so you will have to destroy insect looking aliens. Up to 4 players can team up simultaneously in order to get rid of the unwanted beasts. As you progress through the game you will gain new levels and unlock achievements and new equipment. There are different characters and 4 classes in Alien Swarm. This is a super fun shooter you need to try.