Electronic Arts' free online shooter, Battlefield Heroes is adding a little something into the mix for fans of the game.  Whether the developers have become fans of Twiight: New Moon, the Underworld films, or both is unknown but the eternal battle between Vampires and Werewolves continues online.

Three maps in the web-based multiplayer game have been re-worked to include day and spooky night cycles.  During the day, you'll battle as you normally would.  But at night, the freaks come out as the recently deceased Nationals turn into Vampires and the recently deceased Royals into Werewolves.  While the game is free to play, players will have to purchase all new outfits and items in order to take advantage of the new game theme.

This special event lasts a month so check out the trailer below.