The main character randomly gets on the secret object "Cleaning". There he learns that an unforeseen catastrophe occurred on this site: all the personnel infected with an unknown virus, horrible monsters appeared. You have to get out of the laboratory, defeat monsters, using a different arsenal of weapons: from mines to machine gun turrets. The game contains scenes of blood.
The game has several thoughtful levels.
You can replenish stocks, replenish your health with the first-aid kits,
Also at the levels you can find money, with which you can open access to more powerful and new weapons.
At each level there are bonuses available for passage, which you can find: mines, turrets ...