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

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

Dealing damage which helped your teammate get a kill

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

Winning rounds as the last player alive on your team

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

Fights occurring after the opening duel but before the bomb plant