Hadal BlackSide, a huge laboratory complex in the depths of the ocean, where there were monsters to study such as z-283 and others.... You, a prisoner guilty in the real world very much. But according to the investigation, someone released all the monsters and now this place is abandoned and dangerous. You were given a chance at freedom on condition. Come to this base and take the crystal from there. The chance of death is high, but you had no other choice. After taking the crystal, you were promised freedom and compensation in the amount of dollars. You went on this deadly campaign