This game is very closely choreographed, and the main plot is that you are a scientist that works in a top secret facility (like Area 51) and one day, your experiment goes catastrophically wrong and as a conclusion you are thrown into the crossfire between bloodthirsty aliens and military 'cleaners'. this is a fast paced adventure with battle and puzzles, but also you must inlist in the aid of fellow scientists and security guards to save the world.