Assassination

You turn around quickly and pull out a semi-automatic pistol as the police come one by one down the narrow ally. You pop off a shot, killing the first cop easily. The bullet embedding itself between the eyes of your blue uniformed enemy. A second cop tries to jump over his fallen comrads body and yet he falls to you as well. They continue to come and come, but each go die the same way. Eventually they get smart and hold off from entering the alley, instead choosing to get onto their radio's and call for back up. At this point you have two choice. Stay and try to kill the rest of your enemies off or run while they're wary of coming after you.