 The vehicle dynamics system were rewired so that the Carson performs more realistically than any other car in the game.The Montgomery Hawker Mech also featured a unique boost system, which allows the player to willingly switch between the three different boost types at the touch of a button.On 6 February 2009, via the Criterion Games Network, Criterion announced the "Cops & Robbers" pack, which was released 30 April 2009 for PlayStation 3 and Xbox 360.