Headshots: A player records a headshot when the final/killing blow lands as damage to the opponent’s head.
Kills: A player records a kill when they deal the final/killing blow to an opponent during the round, or after the round but before the reset. Only one player can be credited with a kill for each death on the opposing team. Team kills and self-kills are omitted and will not count.
All stats will only count for the maps specified in the question. For example, for “Maps 1 + 2 Kills”, the player’s combined kills on those 2 maps will be used as the result. Overtime stats will count toward a player’s result if the overtime is on one of the specified maps.