The game itself has sold a whopping 23 million units to date.

Gaffer Eric Hirshberg revealed the figure during an investor event in Los Angeles this afternoon, adding that the average user has spent around $76 on the game. We daresay investors were stoked.

Just for comparison's sake, Treyarch's previous Call Of Duty title, World At War, sold "just" nine million DLC packs at $10, while Modern Warfare 2 managed eleven million at $15 during the same nine month period.

Hirshberg continued that "user engagement" in its Call Of Duty series is at an "all time high".

"There are over 30 million unique players of Black Ops who collectively have amassed, incredibly, more than 2.3 billion hours of play. To put that number in perspective, that's more than a quarter of a million years of play and that means our millions of fans spend more time per day on Black Ops multiplayer than they do on Facebook."

Expect Call Of Duty: Modern Warfare 3 to post similarly impressive numbers when it launches in November.

"There's plenty of runway this year, with 20 percent-plus expected growth in the HD console install base alone," Hirshberg noted. Haters (and EA) best run for the hills.

[Thanks Eurogamer]