It's Blizzcon this weekend and already there has been a flurry of activity, including the announcement of a new IP.  For those more traditional Blizzard fans, fret not, as the final installation in the StarCraft II trilogy has arrived.  Named Legacy of the Void, the game continues where Wings of Liberty and Heart of the Swarm left off with a new campaign that brings the saga to its conclusion.  Protoss legends Artanis and Zeratul attempt to unite their race in an intergalactic fight for survival against an ancient evil from the Void that threatens the universe.

“Legacy of the Void will deliver the quintessential StarCraft II experience,” said Mike Morhaime, CEO and cofounder of Blizzard Entertainment. “The new single-player campaign will wrap up the massive story, and we’re excited to share new game modes that will open up different ways to play the game and additional units that will expand the rich strategic depth of StarCraft II multiplayer.”

Aside from the new campaign, a new cooperative gameplay mode called Archon Mode comes to the series as well as new multiplayer battles featuring new playable units and another new gameplay mode known as Allied Commanders was revealed.

In Archon Mode, two players share control over a single base and units as they take on an enemy duo in multiplayer action. By sharing the responsibility of commanding troops and managing resources, players can focus on their own areas of the battle and execute more intricate strategies.

Multiplayer battles in Legacy of the Void will be fought with an array of new units, as well as upgrades to veteran forces. Zerg swarms will welcome the return of the Lurker, a classic creature from the original StarCraft that lays waste to infantry with deadly spines that burst from the ground. The Protoss field a new weapon called the Disruptor, which can use massive energy spikes to wreak havoc through swaths of ground forces. And the Terrans have engineered some new technology, such as Tactical Jump, which allows their Battlecruisers to teleport to any location on the battlefield. Several more new units and abilities were exhibited at BlizzCon, showcasing the new strategic and tactical options in store for players with Legacy of the Void.

Allied Commanders is another gameplay mode new to StarCraft II. In this objective-based, cooperative experience, players can team up and take on the roles of powerful commanders from the StarCraft saga. Each commander offers unique abilities and upgrades and bestows special bonuses on their armies. Players are able to battle through a series of special scenarios together, leveling up their commanders' capabilities as they progress.

Blizzard is looking to release on both Windows and Macintosh simultaneously with a release schedule to be announced at a later date.  In the meantime, fans can signup for the beta right now at the official Starcraft II website.