Age Of Conan Prepaid Card Do I Need To Buy Age Of Conan Game Or Can I Just Get A 60 Day Card?(I Already Have The Disks From My Neighbour

Do I need to buy Age of Conan game or can I just get a 60 day card?(I already have the disks from my neighbour - age of conan prepaid card

I borrowed the CD from my friend and the game installed and I wonder if I can buy a prepaid card, and create a new account, or that I buy the game first?