You play as Alastair, a 19th century researcher who has devoted his life to the study of the Four Horsemen. Upon hearing reports of their arrival to Earth, Alistair realises that he may have the solution to save mankind from annihilation...
The Four Horsemen easily achieves a level of quality present in the original game. Plot, voice acting, atmosphere...
The level design, especially, is to be applauded. The levels could use optimisation, however. Also, you can get lost a few times.