I honestly don't remember. I probably played offline ( I was like 11 when I started, so the memory is foggy), but what I can recall most recently is that I was on my own. As for nowadays, I only play offline at the moment because I haven't installed D2 yet. Like I said, my internet is garbage (and my last PC died, so now I'm on my laptop), so I need to head up to the college tomorrow and get it installed before I come back home.
Right now, I'm just playing Diablo for PS1 until that happens.