Delusion:Source is a single-player story about a sanitarium patient who is forced out of his institution during a violent outbreak. You are Jacob Stiltz, a resident in Walnut Cove's Hospital for the Criminally Insane. Little is known about you, even you yourself are oblivious to yourself and your surroundings. What happens when a lunatic is released unto the world unsupervised, with his only guidance coming from another inmate that suffers from the same condition as yourself? It's a thriller story that only you, the player, can unfold.