Revelations is set in 1980, eight years after the global zombie outbreak and five years after the United States of America was rebuilt. Revelations includes four new characters and maps, and new weapons (old weapons return as well). Revelations costs $15.00 dollars on Playstation 3 and 900 Microsoft Points for the Xbox 360 (it is not available on the Wii).
As stated above, the map pack includes four new maps. Each map continues the Apocalypse storyline. In the special edition of Revelations, the map "Outbreak" is available.