They don’t. You can call it bittul torah, but they don’t create an inclination to violence. They may bring out violent tendencies that already existed, but 20+ years of violent games being played by kids all over the world has pretty much disproven any knee-jerk reaction to try and claim that playing violent games causes kids to become violent.
Frankly, I think kids should play games rather than watch TV and stuff. I learned alot from games growing up, problem solving skills, logical thinking and the like. A good adventure or rpg game provides hours of wholesome entertainment.
Now I expect to be drowned out in a sea of people telling me I’m wrong with no real proof or reason.