Priest, Simon (April 30, 2012). "Prototype 2 consumes Uk chart throne, The Witcher 2 Enhanced slips 6th". GameWatcher. Matos, Xav (September 30, 2010). "Forza Motorsport and Top Gear Tv Combine Forces in a Partnership for Future Forza Titles". Hayes, Lance (October 30, 2013). "Forza Motorsport 4". iTunes. Martin, Liam (October 6, 2011). "Forza Motorsport four overview". Priest, Simon (October 17, 2011).