In his rambling, 1,500-page manifesto, Norwegian shooter Anders Behring Brejvik said he used the video games "Modern Warfare 2" and "World of Warcraft" as training methods.

Brejvik, who is responsible for killing seven people in a bomb attack and shooting 86 people in a youth camp, said in his manifesto titled "2083: A European Declaration of Independence" that he used Activision's popular "Modern Warfare 2" as a training simulator and claimed "World of Warcraft" is a blind for abnormal behavior.

"I just bought 'Modern Warfare 2,' the game. It is probably the best military simulator out there and it's one of the hotttest games this year," he wrote in February 2010.

"Target practice is likely going to be a problem for many people in certain countries (urban Europeans like us, ouch:). Consider taking a vacation to a country where you are able to train in marksmanship or join a gun club. Simulation by playing Call of Duty, Modern Warfare is a good alternative as well but you should try to get some practice with a real assault rifle (with red point optic) if possible."

Another related passage in the manifesto recounted Brejvik's thoughts on the multi-player, role-playing game "World of Warcraft."

"[For] example, tell them that you have started to play World of Warcraft or any other online MMO game and that you wish to focus on this for the next months/year. This "new project" can justify isolation and people will understand somewhat why you are not answering your phone over long periods. Tell them that you are completely hooked on the game (raiding dungeons etc). Emphasize to them that this is a dream you have had since you were a kid."

The result has been another attack on violent video games from conservative groups who are blaming games for the shooter's actions. The fact that Brejvik used these games to further his murderous agenda, however, has not attracted the same kind of vitriol that followed the Columbine or Virginia tech shootings.