edit: l0l okay, I figured nothing like that would exist.
Since I'm home for break and there's rather spotty internet, I'm looking for a game I can put a lot of time into offline while still having rewarding multiplayer play. One example of course is Diablo, but D2 isn't really interesting to me at the moment.
Currently all I have is Dungeon Defenders, which works fine on a terrible connection but I have to play alone, which kind of defeats the purpose. I have a few single-player RPGs but I can't bring myself to play them since I feel like I'm wasting time on something with no multiplayer

No FPS games, please; those make me dizzy, unfortunately. And yes, I know what Minecraft is. Anything else works though. The games I have played the most are SC1, WoW, DotA and LoL, and Magic: the Gathering, so really I'd be okay with anything of the type. It just has to work with either no or poor (~500 ping) internet connection and have some rewarding PvP or even just co-op (Dungeon Defenders) aspects.
(Although, DD has pretty hilarious PvP :3)