Tag Mode is one of several multiplayer modes available in Dragon Quest IX. It is the 'passive' wireless mode which uses the DS wireless capabilities while it is in sleep mode. It is used to exchange player data and items with other Dragon Quest IX games, including treasure maps. Tag Mode is one of the major reasons Dragon Quest IX was extremely popular in Japan. It was the source of a new Guiness World Record for most game players communicating anonymously in a multiplayer mode.