Get on your bike and ride. Return to Liberty City and experience a whole new campaign for GTAIV
The new expansion sees you back in Liberty City, not as Niko Bellic, but as Johnny Klebitz, a member of The Lost biker gang. The Lost? Yes, that's the biker gang you ran into at various points during the GTAIV quest line.
Anyway, at the beginning of the game (it can be argued that TLAD can be a separate game all together) The Lost's President, Billy, gets out of jail. Johnny has spent the last disclosed amount of time as acting President, building up a profit for the gang by conducting business instead of bloodshed, and that just don't sit right for Billy.
So, as Johnny, you begin to take part in mindless killing missions, tearing apart rival gang, The Angels of Death. Slowly, the plot turns away from the inter-politics of The Lost and Johnny gets caught up in other things, which includes a certain deal involving diamonds and a certain European lunatic.
Now, in GTAIV, motorcycles were not the best way to move from point A to point B, in fact, they were horrible. The slightest nudge from something large enough would send you hurtling through the air like the Havok engine was designed to do. Since your a member of a motorcycle gang, and spend far more time driving one than a car, Rockstar have made a few tweak preventing you from flying off at a moments notice (least to say though, you still can humorously go flying off it)
Other things have been added, such as new music. Liberty Rock Radio has the most new additions, ranging from Deep Purple to ACDC. Two two weapons are added, a high powered handgun, and a sawed off shotgun.
The presentation of TLAD is the same as GTAIV, with mostly cosmetic changes to separate the two different stories (TLAD having a more dirty looking menu opposed to a more clean looking style).
Is this the best game expansion ever? No. But certainly the best downloadable content available on XBL. Rockstar have not only delivered something new within their GTAIV world, but have crafted a story that runs parallel to the original content.
Whats Good: More GTAIV, need you ask for more?
Whats Not Good: Could have had more side missions (most wanted etc) possibly more Lazlow related content