Instance dungeon

In MMORPGs, an instance dungeon is a special area, typically a dungeon, that generates a new copy, or instance, for each group that enters the area. This ensures that there will never be competition (kill stealing, spawn camping) over mobs within the instance and that player characters receive a minimum of lag. Instance dungeons may contain stronger than usual mobs and sought-after equipment.

Games that have been known to use instancing include EverQuest, Anarchy Online, Dark Age of Camelot, City of Heroes and Guild Wars. The latter uses instancing extensively to help make the product free of monthly fees.

World of Warcraft also uses this for Dungeons, but does not randomly generate it.