Can I use third-party equipment to play my PS2 online so that I don need an Official PlayStation 2 Network Adapter?
Yes, but I don’t recommend using them. They are less likely to work with newer PS2 games. For example, SOCOM 2 only works with the official PS2 Network Adaptor. After all, Sony prefers that you purchase its adaptor, instead of a 3rd party one. And more and more games are only working with the official adaptor. Just save yourself the hassle and pick-up the official adaptor ($30 to $40). Or you can get a built-in adaptor for free by purchasing the new slim PlayStation 2. Note: I can no longer provide technical support for USB adaptors. Do not e-mail me about them.