Activision has announced that Call of Duty: Black Ops has sold over 18 million map packs, meaning consumers have spent an average of $76 on the game or an 18 per cent increase on the retail price. By comparison, Call of Duty: World at War sold 9 million map packs in its first nine months for $10 per pack, that equated to an average user spend of $68 while Modern Warfare 2 sold 11 million downloads over the same time period at $15 each.

“There are over 30 million unique players of Black Ops who collectively have amassed, incredibly, more than 2.3 billion hours of play,” said Activision Publishing CEO Eric Hirshberg. “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.”