Sales of 'Call of Duty' map packs top 20 million

The number of map packs downloaded for Activision's first person shooter franchise Call of Duty has crossed the 20 million mark.

The franchise introduced the downloads to players in 2007, with the arrival of Call of Duty 3. Most recently, studio Infinity Ward released the Resurgence Map Pack, five fresh maps for their hugely popular 2009 title Call of Duty: Modern Warfare 2.

The milestone arrives following scrutiny surrounding the price for Modern Warfare 2 map packs. The downloads, which feature three new maps and two remastered environments used in Call of Duty 4, retailed for $15.

The next title in the series, Call of Duty: Black Ops, is slated for release in November.

Readers, still playing Call of Duty?