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

Fights occurring after the opening duel but before the bomb plant

Dealing damage which helped your teammate get a kill

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

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

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

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

Winning rounds as the last player alive on your team