Activision may have skipped its annual five-day totaling of Call of Duty sales, but the publisher announced this morning the latest installment, Black Ops 2, grossed $1 billion in 15 days.

The publisher announced shortly after Call of Duty Black Ops 2's launch the annual blockbuster made $500 million in 24 hours at retail, eclipsing Modern Warfare 3's record of $400 million the year prior. The lack of a five-day total, which the company had done for three years running, gave some analysts "cause for concern" that Black Ops 2 wasn't selling as well as previous installments.

Seeking a new way to contextualize the achievement, Activision noted the $1 billion milestone was achieved faster than James Cameron's Avatar, which in 2009 reached a billion in ticket sales in 17 days. Modern Warfare 3 reached the one billion milestone in 16 days.