Everyone is John
A freeform storygame in which players portray the voices in the head of an insane man named John.
Play begins with John waking up in the morning (and a test for control of him). The GM then describes the circumstances into which he wakes up. With John, you never can tell. He could be in a gutter somewhere, or he could be in a palatial estate, or anywhere in between. The Voices really have no idea how they ended up here. At this point, the Voices should start working on fulfilling their obsessions and avoiding getting John killed.