We have a new batch of screenshots from Grand Theft Auto IV, illustrating 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.