Kill 10 people without dying? Haha Seriously though, stay with your team and play defensively. Don't push and back off when you're obviously going to lose a gunfight. I see a lot if stupid shit when i play, like people with a sliver of health charging down a hallway with a shotgun trying to finish someone off, challenging snipers repeatedly and charging defender bubbles like lemmings jumping off a cliff. Basically, stop playing like a ri-tard.