computer games that I should be able to play?

AMDathlon X2 4400 + Dual Core Asus M3A Motherboard 2GB DDR2/667 ATX Mid Tower w / 400w psu 160GB 7200RPM SATA Nvidia 8600GT 256MB PCI-E 20X DVD + /-RW integrated sound and LAN Windows XP Home Edition any good MMO's or shooters. im mainly wow im asking this because someone will build it for me for 630 or I would ibuypower.com tigerdriect but the only thing is that I do not have a credit card, also I checked bestbuy but they have absoultely nothing all the good things is unuvailable. Walmart and was the biggest waste ever.

well theres many anser there www.toontown.com www.pirates.com www.clubpuingin.com thats all i know