Everyone I knew with a PS1 had a mod chip in it to play copied games. Cracks and CD-keys for PC games were everywhere online. It was dummy easy to do even before Napster or Kazaa, but those things definitely accelerated it. I remember people in college having pirated copies of photoshop, mathematica, and autocad because they needed them for classes and didn't have $600-$1000 to shell out on software on top of books - I know that isn't games, but the principle of pirating them was pretty similar at the time.