Download Operation Genocide
Operation Genocide is a fast paced game that puts you directly into the action, as you will have to fight your way out of an alien base. You do not remember how you got there but you know that you must not spend another second among these creatures.
You will have to fight different types of aliens and some of them are hard to defeat because they can become invisible at some points in the game and you will need special weapons to detect and destroy them. However, the game is fun to play even if you do this more than once.