Penumbra: Black Plague

Trapped in a shadowy, underground complex, intrepid explorer Philip is determined to discover the truth behind his father's disappearance.
Surrounded by enemies and assaulted by terror from all sides, Philip must collect clues and solve vexing puzzles while combating the gnawing psychological terrors that assail his mind and threaten to strip him of his sanity.
Can Philip master his fear and finally uncover the truth behind a mystery that has haunted him for a lifetime? Only you can decide...