How do you know if your ps3 is able to play ps2 games?

ps3's cant play ps2 only ps1 or ps3 or blueray if you dont trust me stick the disc in and a message will come up under games saying ? disk incompatable

Put in a PS2 game and see if it works?

But yeah only the original 60GB PS3's did, maybe a few other older models. But not recent ones

khiyelsmith is correct. here is a link that shows you which ps3 models that will play ps2 games. remember though that even if you have a ps3 that is compatible, not all ps2 games can be played on that unit. follow the next links for info:

first link is the list of model numbers of ps3 units that a re ps2 compatible:

http://us.playstation.com/support/answer/index.htm...

next link is a playstation official page that you can type in game names and see if they are compatible with the ps3 unit you may have(assuming the unit you have is ps2 compatible):

http://us.playstation.com/support/compatiblestatus...

You'll find 'PS2 Data' in USA and EU Store only, in Asia/Africa/Australia it is not available sorry!

then you'd play only Original PS2 games not fake ones!