- Wolfenstein 3D is an episodic first-person shooter and a follow-up to the top-down infiltration game Castle Wolfenstein. The game puts the player in the boots of B.J. Blazkowicz, an allied spy. There are six episodes: the first distributed complete as shareware; the second and the third available after registration; and the three final missions (which happen before the events of the first episode) available in the Nocturnal Missions pack.