Fallout 3 Game add-on pack: The Pitt and Operation: Anchorage

Operation: AnchorageEdit
Operation Anchorage cover Bethsoft
Main article: Operation: Anchorage
“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.”— official description

Operation: Anchorage was released on January 27, 2009 for PC/Xbox 360 and on October 1, 2009 for PS3.
The PittEdit
The Pitt cover Bethsoft
Main article: The Pitt
“The Pitt allows 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 Pitt is filled with morally gray choices, shady non-player characters, new enemies, new weapons, and much more.

Source: TheGamesDB