2 Missions. Operation Anchorage and The Pitt.
Four hours of game play in each one means a total of 8 hours, which is as much as most full price games! The original product is required in order to be able to play the add on packs.

Operation: Anchorage. Enter a military simulation and fight in one of the greatest battles of the Fallout universe -the liberation of Anchorage, Alaska from its Chinese Communist invaders. Gain access to unique armor, weapons, and exotic gadgets while you build and command interactive Strike Teams to win the battle and defeat the Chinese base.

The Pitt: The Pittallows you to travel to the post-apocalyptic remains of Pittsburgh, Pennsylvania and become embroiled in a conflict between slaves and their Raider masters.Explore a sprawling settlement ravaged by time, neglect, nuclear radiation, and moral degradation. The Pittis filled with morally grey choices, shady NPCs, new enemies, new weapons, and much more.