Ahead of the full releasethis March,StarCraft II: Heart of the Swarmhas expanded its beta to include people who pre-purchased a digital copy of the expansion on Battle.net on or before December 18. If that describes you, be sure todownload the clientand start playing.
According to Blizzard, those who pre-purchase after that date aren’t completely out of luck — further waves of these players will be given beta access “on an approximately weekly basis.” The company also reminds that participating retailers, such asAmazon, have beta keys.
Heart of the Swarm beta expanded with pre-order access[PCGamesN]
