http://www.shacknews.com/featuredarticle.x?id=386Citazione:
To encourage players to continually improve their skills at playing the various classes, they are presented at the end of each round with a drilldown of their top scores in a variety of categories, with a note indicating with which class the achievement was reached. Obvious stats such as kills, deaths, assists, flag captures, successful defenses, headshots, and total damage points dealt are tracked, as are more TF2-specific ones such as total health points healed as Medic, number of "invulns" used, kills by sentry gun, number of times teammates used your Engineer-built teleporter, Spy backstabs, and so on.
In a welcome addition, the game also tracks revenge kills. An enemy player who kills you particularly often will be branded your nemesis, and you will receive extra points for returning the favor. Though by no means unique to Team Fortress 2, the mechanic suits the game and its total-destruction-meets-espionage aesthetic quite well.
