Personally, I can recommend his large selection of international board-games. He even stocks English versions of some very popular German boardgames, such as "Settlers of Catan" and "Carcassonne" (which I can really recommend, both for friends & family). The selection ranges from very simple but entertaining card games up to very complicated strategy board games. Prices are really fair and as mentioned, the owner's support is outstanding.
Links: Shop's Website | Google Maps

Please also note: that the shop has a temporary shop-front and that you enter at your own risk (should be repaired by the 10th of December):

Update: Everything is back to normal now!