The official website of Grand Theft Auto IV has been launched, serving new details about the next installment of the series in the works at Rockstar North and due to be released worldwide on April 29th for the Xbox 360 and PlayStation 3. Grand Theft Auto IV is powered by Rockstar's proprietary next generation game engine, R.A.G.E., allowing for an unprecedented level of realism and interactivity. The game is also using euphoria, a fully procedural animation engine created by NaturalMotion. A new batch of screenshots has been added in our gallery.