 On 22 November, US Senators Joe Lieberman, Sam Brownback, Evan Bayh and Hillary Clinton wrote an open letter to the ESRB asking for the game to be re-rated AO; "we ask your consideration of whether it is time to review the robustness, reliability and repeatability of your ratings process, particularly for this genre of 'ultraviolent' video games and the advances in game controllers.We have consistently urged parents to pay attention to the ESRB rating system.We must ensure that parents can rely on the consistency and accuracy of those ratings."