StarCraft II: Legacy of the Void is a standalone expansion pack to the military science fiction real-time strategy game StarCraft II: Wings of Liberty and the third and final part of the StarCraft II trilogy developed by Blizzard Entertainment. The game was released on November 10 2015. The expansion includes additional units and multiplayer changes from StarCraft II: Heart of the Swarm as well as a continuing campaign focusing on the Protoss race. The campaign which focuses on Artanis as its protagonist is a sequel to Wings of Liberty and Heart of the Swarm and concludes the StarCraft II trilogy. Blizzard launched its invite-only beta testing of the game on March 31 2015. The testing closed on November 2 2015 a week before the November 10 release date.