[BonsaiDen]

They are. Games are not recognized as art here in Germany, so they do not get the same treatment as movies or books and have to remove the references. International releases of these games are actually illegal in Germany and owning them is an indictable act, although actual criminal charges are very rare (since there's hardly a way of controlling the digital distribution).

[Mithaldu]

You're all right and wrong. They are in a quantum state. The youth protection agency thinks games are not art and as such wishes to not allow them. However the matter has never been in front of a legal court, and until that is done, they are only censored out or pro-active fear, not because they're actually illegal.