A Downloadable Content Pack (also known as a Map Pack or DLC Pack) is a downloadable extension to a game. For Call of Duty, it usually contains various maps. In Call of Duty: World at War, the pack contains 3 Multiplayer maps and 1 Zombies map, while in the rest of the games, the packs usually contain 4 Multiplayer maps and 1 Zombies map, however, there are some exceptions and additions, such as the Ray Gun Mark 2 in the Vengeance DLC. These maps can be played alone or with other players who have purchased the pack.
In World at War, the packs usually cost 800 Microsoft Points on the Xbox 360, $9.99/£7.99/€9.99 on the PlayStation 3, and $0.00 on Steam.
On the rest of the games, the packs usually cost 1200 Microsoft Points on the Xbox 360, $15.00/£11.59/€14.45 on the PlayStation 3, and $14.99 on the other platforms (PC, PS4, and Xbox One).
Some minor packs (such as Nuketown Zombies and The Giant) simply cost $3.00 on all platforms available.