The almost conclusive episode of Penumbra—until Requiem's controversial release—, Black Plague, fulfills the implications of Overture as an introductory chapter by developing the narrative threads to their Lovecraftian ends. Frictional Games realize a horrific environment of infections and insanity within an ancient, clandestine organization's secret research base to contemplate through the mind's manipulation a mirror of humankind's own selfishness as it relates to the alien findings within this base. One scene, specifically, speaks to this end with the game's only "combat" sequence—devastating, to say the least—and the introduction of Clarence, albeit annoying at times, intentionally so, evokes greater depth to the game's themes. The puzzles in Black Plague are as good as Overture, the horror and the monsters as well, but the narrative intrudes in aspects which, by providing more information, lose the implications and unknown aspects of Overture. On the whole, Black Plague remains a great game and a good, somewhat rushed conclusion. Unfortunate to some, Requiem remains as the true ending.