I have the TG16 versions of Ys 1-4 (3 and 4 in Japanese unfortunately). I used to have the Sega Master System version of Ys 1 but sold it because I didn't see the point when the TG16 ver was more my style (well, that and I needed cash at the time). You can't go wrong with this series, at least none of the ones that I've played. I never did get to play any of the ones after Ys IV tho...