I still remember the good ol' Uni days, when the campus internet had a proxy server that severely limited any online gaming. Guess who decided to figure out how to install their own private Diablo 2 battle.net style server to solo play on.

The big downside to Diablo 2 was that while you could play single-player, there were a lot of good drops that were limited to the bnet ladder server. Not sure Pluggy was a thing back then, or if it was limited to older patches of the game.