GOG's success is proof that being able to easily get your hands on classic games and have them work on modern operating systems is a winning formula. But there's a little more to it than simply wrapping a game up in DOSBox or some other layer and plonking it on your digital distributor of choice. Today's release of the Bitmap Brothers' 1996 strategy classic Z on GOG and Steam is a good example of how things can go less than right when a developer tries to market a port as a "remake".