Getting the first kill or being the first death in the round

Winning rounds as the last player alive on your team

Rating gained or lost as a CT after the bomb was planted

Fights occurring after the opening duel but before the bomb plant

Rating gained or lost as a T after the bomb was planted

Dealing damage which helped your teammate get a kill

Carrying guns and equipment forward into the next round when your team lost

Rating given back to you when your death helped a teammate get a kill

Credit for winning the round when opponents were still alive (adjusted down by the value of the equipment they saved)