While I can't comment on German culture and governance since I know little about it, I am certain that such laws could not possibly be enforced in the totalitarian manner implied by some of you.
I mean, aside from the ubiquitious Warez argument, it can't be too difficult to import these games from nearby countries (Germany is not geographically isolated from the rest of Europe.) And there will be no doubt some slightly seedy, backalley stores that will simply ignore this ruling. As for advertising, well the internet hasn't been banned right? Any minor who really wants either of these games will find ways of getting them.
Oh, and the comparisons I've read in here likening Germany in WWII to today's Germany are bull. Read a bit of any literature on the subject and you find that even back then, not everybody there was a Nazi.
"Nothing livens up a robotic hymn of doom more than an amazing pair of jugs." - Brak