PK/PVP
Players are allowed to attack and kill other players ingame for any given reason, though it is generally frowned upon. Once a player has killed another player they are labeled with either yellow or later, red, that informs other players that they have killed somebody recently. Red players are not allowed in most cities and are generally ignored by NPC's. Red players are also fair game to other players, a punishment for their PK status.
Another punishment is the chance of having one's weapon cursed by killing another player. Curses cause weapons to deal less of a melee blow. Increased number of curses will render a weapon useless.
While attacking another player, the attacker will be labeled with a Brown player name. Any other player can attack and kill the offending player without accumulating PK points.
Read more about this topic: The Legend Of Mir 2