Paradox Interactive today announced that Frictional Games is developing Penumbra: Requiem, an expansion which will tie up loose ends from previous installments and as Philip progresses he will encounter various characters from his past. Penumbra: Requiem delves deeper into the world of the Tuurngait infection and personalities from the previous two games, Overture and Black Plague. Penumbra: Requiem will be a download only expansion and available exclusively via GamersGate.