Experience

Experience (abbreviated as XP) is earned at the end of each match in Tribes: Ascend. XP is used to acquire a class's Skills, Perks and to buy or upgrade weapons. A player does not need to stay until the end of a match to earn XP. The amount of XP gained depends on the outcome of the game, the length of the match, player performance, and if any Boosters are active. A player also gains a flat 1200 XP bonus from the first win of the day. XP is earned on a global basis as of the 9th feb. 2012 patch. Prior to this it was split between the classes you used in the match.

Experience may also refer to the XP gained toward a player's rank progression.