The Lost and Damned is an add-on of grand Theft Auto IV. It is the first of two episodes that is downloadable from Xbox Live from 17th Febuary 2009 for either $19.99 or 1600 Microsoft points. It is based on Biker Gangs in Liberty City during 2008. The protagonist for the Lost and Damned is Johnny Klebitz, A member of The Lost Brotherhood biker gang.
The Add-on also feaures extra missions, Multiplayer modes, weapons, vehicles and music/radio shows. Although Microsoft has the rights to make The lost and Damned avalible to the PC version (Games for Windows) they have decided not to.