"We don't have the resources or time to add a fourth race to the launch of StarCraft II, but I'm sure in the event that we decide to do an expansion set it's a feature that'll come up for discussion," studio co-founder Frank Pearce told videogaming247.

He explained that the team had originally considered adding a fourth race to the long-awaited real-time strategy sequel, but opted to focus on the "the cool, best ideas on the existing three races rather than diluting those ideas across four races."

Though the company has yet to detail when StarCraft 2 will arrive on PC, Blizzard has a history of releasing at least one expansion pack for its recent PC efforts, including the original StarCraft, Diablo I and II, Warcraft III, and World of Warcraft.