Experiment 0643, the most dangerous of them all. A violent monster who is confined to a large empty cell for examination. Only, the scientists gave up on him. He was too violent, so they left him alone and never really observed him, believing they had learnt everything they could. But one day, they decided to do something different. The cell door was opened, and you were shoved in with no explanation. You were then left alone with Experiment 0643.