Let me be clear first that I'm not making any judgment calls. I just find this to be a very interesting page documenting a developer so focused on the German market.  I suppose I always assume that any mainstream game that sees a PAL release will always find its way into Germany, but I suppose that wasn't always the case in the early Atari and PC days.  Anyway, identifying which titles are more "original" than "appropriated" (which is nicer than saying 'knock-off') would be interesting information as well.