Starcraft II : Legacy of the Void (PC/Mac)

Also Available: Collectors Edition here
Game + Beta version here

Wings of Liberty available here
Heart of the Swarm also available here 

StarCraft II: Legacy of the Void continues the epic saga of the Protoss, Terran, and Zerg. These three distinct and powerful races will clash once again in the fast-paced real-time strategy sequel to the legendary original, StarCraft. Legions of veteran, upgraded, and brand-new unit types will do battle across the galaxy, as each faction struggles for survival.

Featuring a unique single-player campaign that picks up where StarCraft II: Heart of the Swarm left off, StarCraft II: Legacy of the Void will present a cast of new heroes and familiar faces in an edgy sci-fi story filled with adventure and intrigue. In addition, Blizzard will again offer unparalleled online play through Battle.net, the company's world-renowned gaming service, with several enhancements and new features to make StarCraft II the ultimate competitive real-time strategy game.

• Groundbreaking Protoss-focussed single-player "story-mode" campaign
• Fast-paced, hard-hitting, tightly balanced competitive real-time strategy gameplay that recaptures and improves on the magic of the original game
• Three completely distinct races: Protoss, Terran, and Zerg New units and gameplay mechanics further distinguish each race
• Vibrant new 3D-graphics engine with support for dazzling visual effects and massive unit and army sizes
• Full multiplayer support, with new competitive features and matchmaking utilities available through Battle.net
• Full map-making and scripting tools to give players incredible freedom in customizing and personalizing their gameplay experience