Blizzard's just announced StarCraft II sold 1 million units last week during its first 24 hours on sale, and 1.5 million during the first 48 hours.
According to GameStop, it's the retailer's biggest PC launch since World of Warcraft: Wrath of the Lich King.
"We launched StarCraft II in 11 different languages and on 5 different continents because we wanted to make sure as many players as possible were able to log on and play on day one," said Blizzard boss Mike Morhaime.
"We're pleased that so many people around the world have already picked up a copy of the game, and we look forward to welcoming even more players to Battle.net(R) in the weeks and months ahead."
Launched worldwide last Tuesday, the game is split into three parts: Wings of Liberty being the first, followed by future add-ons Heart of the Swarm and Legacy of the Void.