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 Heart of The Swarm, as well as a continuing campaign focusing on the Protoss race. The campaign concludes the StarCraft II trilogy and focuses on Artanis as its protagonist. Blizzard launched its invite-only beta testing of the game on March 31, 2015. The beta testing closed on November 2, 2015, a week before the November 10 release date.

The pre-order of the game was announced and made available for purchase on and major game retailers on July 15, 2015. Pre-ordering the game granted immediate access to the multiplayer beta and a set of three prologue missions titled Whispers of Oblivion, which was made available to all players following the StarCraft II: Heart of the Swarm 3.0 update at October 6, 2015.