[scourdx]

I would keep it simple and go by title release and split them by decade time (80,90,00,10 & etc). Within the title, we can mention variation and different region CE. I would not count PC games into specific OS because it can open a lot of debate. For instance older games like Starcraft would work on Win95, 98, NT, 2000, ME, XP, Vista, 7 and Mac. So it will be too hard to confirm which game will work with what OS. I would generalize it as PC or Mac game. As for type of CE, PC do get a lot of shovelware to attract all the casual gamer. A lot of the packaging do mention special edition and other marketing ploy. I would ignore that and stick with PC CE that offers more than just a jewelcase packaging with limited edition written on it.