Rockstar today announced that Grand Theft Auto IV will 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. Ten new screenshots found their way in our gallery.