Soon you will be able to play GTA IV or its The Lost and the Damned expansion on Xbox LIVE for free. Specifically from Tuesday, February 17 at 9:00AM PST to Sunday, February 22 11:59PM PST, multiplayer service that usually required a paid Xbox LIVE Gold subscription will be free for owners of those games.
Rockstar and Xbox LIVE will also be holding sweepstakes promotions and give users a chance to take on DJ Statik Selektah in the new game. So mark your calendars and be sure to get in 5 days of solid gaming. More info here.