PvP (Diablo II)
PvP is an abbreviation for Player versus Player, a system which allows players to battle each other with their characters.
PvP functions much the same way as regular battle does in Diablo II. The players move their characters around in the wilderness where the fight is taking place, and use their various skills against each other. Some skills function differently against other players though; for example, the Amazon skill Freezing Arrow will only chill players, not freeze them, and some abilities, like the Necromancer's Confuse doesn't work on other players at all.