Dubbed the Variety Map Pack, it brings four new multiplayer maps to the fold: Creek, Broadcast, Killhouse, and Chinatown, a remake of the classic CoD map Carentan.

Unlike the pack's earlier console releases, which sold for $10, the PC edition will be available for free thanks to a sponsorship from Nvidia.

"In addition to the map pack hitting, PC Players will be receiving the 1.6 Patch for the PC version of Call of Duty 4: Modern Warfare that will add support for the new maps, fix a server crash exploit recently reported by the community, and a few additional features / bug fixes," community manager Robert Bowling wrote on his blog.