Xbox 360 exclusive downloadable expansion priced 1600 MS Points.

Grand Theft Auto IV: The Lost and Damned screenshot

Rockstar Games' GTA 4: The Lost and Damned DLC is now available to buy from Xbox LIVE Marketplace.

The highly anticipated Xbox 360 exclusive DLC promises hours of gameplay which extends the GTA 4 experience through a new story.

The DLC blurb states: "Johnny is a veteran member of The Lost, a notorious biker gang. Johnny has been creating business opportunities for The Lost in Liberty City, but his first loyalty must be to the patch he wears on his back and to Billy Grey, the club's President. However, when Billy returns from rehab hell-bent on bloodshed and debauchery, Johnny finds himself in the middle of a vicious turf war with rival gangs for control of a city torn apart by violence and corruption. Can the brotherhood survive?"

The Lost and Damned promises to be a landmark DLC release, with the downloadable episode more akin to a retail game than what we've come to expect from DLC. Look out for VideoGamer.com's verdict soon.

You can purchase The Lost and Damned and add it to your Xbox 360 download queue by hitting this link. Remember that you will also need a copy of Grand Theft Auto IV to play the DLC.