You need a modem & a central station cd disk (eeeebay!) & internet router so you can plug the internet in to the ps2 or you could just use your comp modem but you will lose internet to the comp while on the ps2,

If you got broadband i think you need somethink special (cable) or... for the broadband coming though the phone line tho, not sure

BTW PPL... i play killzone online