macuahuitlgog: It's not a law but we shouldn't underestimate extremists. And most people in Germany, think people who play violent 3d shooters are sick people playing games that simulate murder.
ok not underestimate extremests is a good point, but that doesnt mean you have to live in the fear that they exist, because such extremists live in every country, also its not like those extreme anti gaming laws where just barely shut down, they pretty much always run into a brick wall and pretty much nobody who has something to say regarding such decisions aproves such a law
macuahuitlgog: Is it illegal for me to give someone a banned game as a gift?
if its "beschlagnahmt" yes, there is no work around, you may not distribute a game that is "beschlagnahmt"
if you own it, and you do something that causes the owner to change to someone else (sellign, gifting, trading away) you broke the law