Dies irae: Also sprach Zarathustra (Day of Wrath: Thus Spoke Zarathustra) is a surreal eroge originally released by studio Light in December 2007. The title itself is a mix between the medieval Latin hymn "Dies Irae" about the day of judgement, and the books "Also sprach Zarathustra" by German philosopher Friedrich Nietzsche. The game's protagonist is Ren, a student who was hospitalized for two months after an epic battle against Shirou. After he leaves the hospital to try and start a new life, he has a dream of a guillotine, a murderer who chops off someone's head, and the knights who chase him. Eventually, Ren crosses over the boundary between ordinary life and extraordinary life. Dies irae received a remake in 2009 subtitled Die Wiederkunft (The Return), featuring touched up CGs and a rewritten script. The end of 2009 also brings an expansion subtitled Acta est Fabula (The Play Is Over), which introduces routes for Kei and Rea, as well as the improved routes from Die Wiederkunft.