Forum:Looking for suggestions

Ok so im a lil old school here and still play games on my ps2 and i got a $25 gamestop card and decided i want an online FPS. I havent really played many at all on ps2 and only multiplayer/online one I ever got into was Return to castle wolfenstein(original and ET). So basicly got a few quick questions... i dont know if the different consoles play on the same servers so if not which ones are still up on ps2 and which one has more ppl on a regular basis? Also if anyone is familiar with rtcw does CoD play fairly similar and if not any suggestions for other ps2 online FPS? (lol i only ask that because some issues on pc now and cant play rtcw anymore and miss it which is why im lookin for a ps2 one)

ty in advance for any help