SOURCE:  Courtesy of CNN website, Doug Gross, June 29, 2011

Here is  a listing of his take on the ten most violent video games, in no particular order. Some of these games were out for play before the ratings system was used.

Death Race (1976)

Mortal Kombat (1992)

Doom (1993)

Grand Theft Auto (1997)

Silent Hill (1999)

Postal 2 (2003)

MadWorld (2009)

Bioshock (2007)

Call of Duty: Modern Warfare 2 (2009)

Bulletstorm (2011)