Upon killing a player, the Aggressor receives Karma Points. The number of points received depends upon the difference between the level and equipment of the Aggressor and the defeated player. If you were attacked first, then you will not get karma points. If the accumulated Karma Points reaches a certain threshold, the Aggressor will become a Criminal. There is no maximum number of Karma Points a player can have.
Karma Points can be decreased by completing various activities and quests in both the open world and instances.
Represents friendly players that are in your party or raid. Green players cannot be attacked.
Represents neutral players that are 3 or more levels below your current level. Criminal status is immediately achieved if you directly kill a White player, or you help the Aggressor in any way.
Both White and Yellow players can only be attacked if the Aggressor enables PvP mode.
Represents neutral players that are 2 levels below you or higher. Killing a Yellow player yields Karma Points.
Represents Criminal players. Criminals are prohibited from entering cities and towns, and most Non-Player Characters (NPCs) are hostile towards them. When killed, their Karma Points are reset, they drop a random equipped artifact or weapon, and the killer gains Honor Points. Some settlements are accessible to Criminal players, but these contain only basic services.
The Criminal status is achieved by killing approximately 100 players of equal level. Upon becoming a Criminal, you will immediately be removed from your current party.