StarCraft 2: Heart of the Swarm coming March 12

The Zerg will rush onto PC and Mac in StarCraft 2: Heart of the Swarm on March 12, 2013, Blizzard announced this morning. The expansion will come in three editions, ranging from $40 to $80 depending on how much extra gubbins you want with your sci-fi RTS.

$40 gets you the bog standard regular edition, which simply contains the video game you'd like to play. $60 bags you the download-only Digital Deluxe version, which includes a Baneling pet for World of Warcraft, the 'Torrasque' skin for your Ultralisks, Zergy Battle.net portraits and decals, plus Kerrigan's wings and a Zerg sigil for Diablo 3 characters.

Or for $80, the physical Collector's Edition packs all that stuff plus a 144-page hardcover art book, Zerg mouse mat, soundtrack CD and a "behind-the-scenes" DVD.

The second part of the StarCraft 2 trilogy focuses on those naughty Zerg and the newly de-Zergified ghost Sarah Kerrigan's attempts to control them. Along with a new single-player campaign, it adds new units for every faction in multiplayer, and buffs up Battle.net multiplayer with jazz like a leveling system.

Pre-orders for the regular digital and Digital Deluxe editions are due to open today.