You awake gradually. You are in a dark cell. You are drifting in and out of consciousness between bouts of violent hallucinations. You are physically weak and have no memory of who you are or why you are here.
You are scared, very scared. The voices in your head tell you that you should be. And you have a feeling, a very bad feeling, that you are not alone.
Purgation is a survival horror experience where your only hope of escape lies in discovering and confronting your past... if you can survive long enough. Escape your cell to wander around an abandoned mansion and learn more about yourself but you are not alone and you are too weak to fight. Your only options are running and hiding to survive.