How to download ps2 games on ps2?

You cannot really download them from the internet directly to your ps2 per say. Even if you download them and make a copy on a disk they will not work.

It talks about a few ways to do what I think you are asking. If you have an old PS2 (fat) you can put a hard drive in it. If you have a slim one (new) you have to get an external hard drive.