Grand Theft Auto IV is the upcoming tenth installment of the Grand Theft Auto video game franchise, announced to be released by Rockstar Games on October 16, 2007 for PlayStation 3 and Xbox 360. It has been confirmed that GTA IV will run on the RAGE game engine, the same engine that powered Rockstar Games Presents Table Tennis. The game is being written by Rockstar president Dan Houser.

Lazlow Jones, who has played the voice of the radio presenter 'Lazlow' in GTA III, Vice City, San Andreas, Liberty City Stories and Vice City Stories, is labeled as part of the cast for the game. Also listed as part of the GTA IV cast is Navid Khonsari, who voiced the porn host in Max Payne and has also voiced characters in GTA games as well, including pedestrians.

Peter Moore, head of Microsoft's Interactive Entertainment Business division announced that Rockstar Games is working on two downloadable packs for GTA IV exclusively on the Xbox 360, which will probably be available within months of the game's release date. Moore described the downloads as "epic episode packs," and not just an extra car or character. A press release during the conference said that the packs would add "hours of entirely new gameplay" to the game. Industry sources have said that the packs will be almost as long as Liberty City Stories. There have been no details on pricing of the downloads revealed. The nature of exclusivity on these episodes is still in vague detail. It is possible that the Playstation 3 version may also include two of its own exclusive episodes as well as unlockable content unlocked by the PS3 version.