Is there a German version of the "game" Mad Libs?
It appears that Mad Libs has not been translated into German.

Also, there seems to be a similar German game named 


  Onkel Otto sitzt in der Badewanne


In the German Wikipedia entry for Mad Libs, the following is stated (in German ):


  A similar game is known in Germany under the name "Uncle Otto sitting
  in the bathtub". The English language, in which nouns, verbs and
  adjectives are hardly inflected, offers far more favorable conditions
  for this game than the German one.