Oh, that reminds me: I've also done it(or damn close) with Ultima Online and EverQuest. Back when UO was actually cool and I had yet to get over my addiction to realize EQ sucks.
EQ; the game where you grind on bears to kill larger, palette swapped bears.
Wow, after three days on small bears, I can finally move onto medium bears, maybe in a week I'll be taking on large bears, or even that bear boss!
Or the sad fact that I once spent half a day smithing needles so that I could make a gauntlet at the end of the day. Then I looked back and said, "Did I just spend half a day making needles?"