BrowserQuest is a tribute to classic video-games with a multiplayer twist. You play as a young warrior driven by the thrill of adventure. No princess to save here, just a dangerous world filled with treasures to discover. And it's all done in glorious HTML5 and JavaScript. Even better, it's open-source, so be sure to check out the source code on GitHub!"

http://games.slashdot.org/story/12/0...o-browserquest