well a game with violence will obviously be violent. yes i like halo and gta, not a big fan of star wars games however, on the othe rhand, i love zelda and mario and games with no violence at all. violence is in games like gta simply because games like that strive for realism, and if you're a real criminal stealing cars and what not. hten violence will be in the game.
also, in games like gta, you have lots of freedom, which is the main draw of that game, you can do WHATEVER you want, and if the player wants to buy a hooker then run her over, he can, the game doesnt force the player to do those things in that game, its the players choice. and as far as halo goes, its a shooting game, meaning things will get shot.
no they arent, most rpg's dont allow you to do whatever you want to whoever you want. and people who say a game is bad because of the violence know absolutely nothing about games or what makes them good. id actually love to see wha twould happen if the people who want to destroy all violent games got their wish, and all violent games were gone for a month, and the violence in the world didnt change at all, id be interested to see who or what they blame next.