During its investor relations call, Activision Blizzard reiterated that Call of Duty continues to set new benchmarks for sales. Though we're already aware that Call of Duty: Black Ops stands as the industry's "best selling game of all time" in terms of dollars, it was unclear where the game stood in terms of units sold.
Responding to a question regarding the unit sales differences between Call of Duty: Modern Warfare 2 and Call of Duty: Black Ops, Activision Publishing CEO Eric Hirshberg revealed that Treyarch's latest title has now achieved 25 million units since launching in November 2010. Modern Warfare 2, he said, has sold 22 million units since it was released in November 2009.
Activision hopes to continue the trend with 2011's Call of Duty: Modern Warfare 3, which the company noted will boast an even bigger marketing campaign than the franchise has seen in the past.
[Ed. Note: Clarified previous statement as was attempted by backlinking to the original source, the best-selling game of all time title Call of Duty holds is specific to dollars sold and not units sold.]