Dealing damage which helped your teammate get a kill
Winning rounds as the last player alive on your team
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)
Rating gained or lost as a T after the bomb was planted
Rating gained or lost as a CT after the bomb was planted
Getting the first kill or being the first death in the round
Fights occurring after the opening duel but before the bomb plant