To be in with a chance of bagging a Beta key, all you need to do is enter your details here .
Heart of the Swarm will bring more than 20 new levels, focus on the Zerg race, and bring all kinds of balancing changes – many of which you'll be able to influence if you play the Beta. Blizzard are introducing clan support too, which you can read about here .
We'll send out codes to the successful applicants, via email, on Friday 18 January. Good luck.