sentences:  Barlog said that the game would have full 1080p HD resolution (changed to 720p in final release) and support Sixaxis tilt and vibration functions.Announced before the DualShock 3 controller was introduced, this caused confusion since the Sixaxis controller does not support rumble.During the 2009 Game Developers Conference (GDC), the creative team said that the Sixaxis tilt capability had been removed because they "could not find a suitable situation to use Sixaxis in the game effectively".