I guess I will talk about some current video game experiences for now. I was playing some of that PS3 at my friends house. One of the games I was playing was kill zone I don't remember what version, the game is a FPS were you select a role(like most modern FPS games right?).
There is the infltrator that uses shotguns and has the ability to camouflage into your ally, so basically there is a green name over his head then it will turn red if you watch them.Marksman well what he does snipe faster then the other guy and not get knifed in the back.Medic this guy can revive the people if the guy is not fully dead( the guy is stretching his arm) and he can revive him self awesome he also uses a rifle and he can call some flying robot to assist him. Enginer just takes sraps from the ground and they can make missile turrets I for got what what else they have.
The A.I in the game was amusing because if you just stand the computer will come after you if you hesitate and then there is the infiltrators that camp at your door and when you go out boom head shot.