[Atroxide]

I am surprised RuneScape isn't on the list. https://www.runescape.com/game?html5=1

Absolutely amazing (the client). They released the client last year and its pretty cool what they can do with the technology, I am pretty certain that they are one of the few games that was fully ported that wasn't an indie game. Not only did they make the new client in HTML5, but it actually offers more features than the original java client (at least from what I heard, haven't played in years) If any HTML5 game of 2013 should get the award, it honestly should be this.

[austinhallock]

Doh! Overlooked that, but you're right that it deserves to be on the list. Knew I'd forget about something big ;)