Blizzard have announced the first expansion for StarCraft II: Wings Of Liberty will be coming out on 12th March 2013. Heart Of The Swarm will continue the story from where the game finished and it focuses on Kerrigan's quest to reunite the Swarm and get revenge. there are over 20 campaign missions and weapons of war.
Blizzard say the expansion will be available at retail and digitally from them. it will have a suggested retail price of £32.99 and will come to Windows XP/Windows Vista/Windows 7/Windows 8 and Macintosh.
Press Release