Call of Duty: Black Ops 2's sales were when GameStop announced that over 1M copies had been sold from that retailer alone during its midnight launch.
The game unsurprisingly dominated social media as well. According to the publisher, Black Ops 2 was a top trending topic globally on Twitter in 23 cities worldwide and the " " launch trailer enjoyed over 30M YouTube views (though Robert Downey Jr. and FPS Russia can claim some of that viewership reasoning.)
There should be a boost in Black Ops 2 sales as the Wii U version launches with the system on the 18th November 2012.
Check out Strategy Informer's Call of Duty retrospective for a look back on the series.