In Harry Potter: Kampf gegen die dunklen Mächte ("Battle against the Dark Forces"), each player slips into a random role, possibly a Hogwarts student, wizard, or witch with magical abilities, and possibly an insidious Death Eater. A game lasts one night, during which players use their special abilities, and one day during which everyone votes on who could be a Death Eater. The role of the player with the most votes loses, as does everyone on their side of the battle, so choose carefully! A free game master app guides the players through the evening and offers atmosphere at the gaming table. Harry Potter: Kampf gegen die dunklen Mächte features gameplay similar to One Night Ultimate Werewolf.