Instance dungeon

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In MMORPGs, an instance dungeon is a special area, typically a dungeon, that generates a new copy, or instance, of the dungeon map for each group that enters the area. This ensures that there will never be competition (kill stealing, spawn camping) over resources such as mobs within the instance and that player characters experience minimum lag. Instance dungeons may contain stronger than usual mobs and rare, sought-after equipment. They also may include level restrictions and/or restrict the number of players allowed in each instance to balance gameplay.

Games that have been known to use instancing include:

• Anarchy Online
• City of Heroes/City of Villains
• Dark Age of Camelot
• EverQuest (instances added in 2003)
• EverQuest 2
• Guild Wars
• Maple Story
• Ragnarok Online
• The Realm Online
• World of Warcraft

Guild Wars uses instancing for every area where monsters must be fought.

One game known for not using instance dungeons is EVE Online. Because of the vast amount of space available in the EVE universe, missions for players are created in real space, which any other player could in theory travel to. This allows multiple players to perform the same mission at the same time (in the same manner as an instanced dungeon) but also allows other players to view or participate in the mission, if they discover the location, or if invited to assist by the player who was initially given the mission.

Several games use instancing to scale the mobs to the players' levels, and/or the number of players present.