Penumbra: Overture is the first in a series of episodic games developed by Swedish developer Frictional Games. It was originally intended as the first episode of a trilogy. With the announcement of the second episode, Penumbra: Black Plague, it was stated that the second game would be the final chapter. However, an expansion has been released since then: Penumbra: Requiem, giving the series a third chapter, although not continuing the story in any way.