We're not only celebrating the launch of Diablo III—during the event, we'll be debuting a completely revamped party system!
The new party system will be better integrated with the matchmaker: it will include the ability to join the matchmaker with friends as a premade, search for more players to join you if you're already playing, and will let you see which games are in demand by others in the matchmaker.
That's not all, though! The new party system will also feature a relay mechanism to make sure everyone in the party is able to connect to and host game servers.
Everyone knows Diablo II is more fun in co-op. Spread the word about the marathon and you'll never need to bother with singleplayer.
Set your name on fire by tweeting about the marathon with the hashtag #qpwy or #quitplayingwithyourself.
To join us in the ninth circle, you'll need Diablo II and/or the Lord of Destruction expansion pack.