Oh I see, how to see is it original?
I think my previous disc is pirated one.
And where to buy?
umm any game shop around, or any department store. to tell if its pirated umm i dunno...the disc itself will look dodgy i guess
If you can buy via the internet then it'll be better; as for telling which is pirated, yeah, anything that looks shoddy (either the disk or packaging, with just scanned-up, inkjetted or copypasted graphics), or if the installer looks like a burned DVD-R (usually a silvery-purple recording surface), then it is pirated.