The year is 2012. A horrible accident occured on the secret military base, developing a series of elite soldiers. The whole staff was infected and mutated.
Samuel Stone was sent to take control over the situation. He already cleaned up the whole first floor. Now he's on the second floor, which leads to the surface.
Stop the mutants once and for all, or they'll break free to the surface and destroy all the living creatures on Earth and became even more dangerous!