Bösenstein is a mod for shareware Wolfenstein, made by Vincent. It was released on July 7, 2008 with a slightly edited version coming out five days later.
As mentioned on Vincent's website, the mod alludes to gay Nazis. Böse is reminiscent of the Danish word bøsse, which means gay. This is often made fun of, as the German phrase Ich bin böse (I am mad) loosely translates to I am gay in Danish (Jeg er bøsse).
For this purpose, the SS guard from the Hotel Romanstein series was put into use. Further sprites have also been culled from other mods, though quite a few new graphics, courtesy of Vincent himself, appear.
As it was available only in shareware, and did not feature any coding changes, it was ported to SDL and re-released in June 2010 along with a handful of other shareware sets.