markers on 17 May 2013
http://www.vgchartz.com/gamedb/?name=gran+turismo&publisher=1535&platform=&genre=&minSales=0&results=200
vs.
http://www.vgchartz.com/gamedb/?name=halo&publisher=10313&platform=&genre=&minSales=0&results=200
Both have sold well. As a franchise GT has done better /thread