Infinite darkness, ominous passages of a military complex became the residence of evil.

Infinite darkness, ominous passages of a military complex became the residence of evil. Thousands of blood-thirsty monsters got into premises of military laboratory. Destroy monsters at any cost! They should not break loose! The various accoutrements, weapon and explosive will be given to you. They are strangers! And all of them should die! Otherwise all of us will be dead. The mankind has only one chance!