The unnecessary aggressiveness is simply caused by what game they play and the controller that the child is holding.
Children who play violent video games go through abnormal behavior.
Violent Video game playing can change a child's behavior. He or she may be want to be left alone, disobedient, and unnatural aggressiveness.
Abnormal behavior can be seen in child's who play these types of games as it shows they do not care what their parents are saying
As children continue to play these types of games, aggression can be continuously built up in children.
Violent video games cause all these negative traits that can be seen, however they can easily be prevented if parents step up and do not allow their children to play these types of games.