Sync

Sync, short for "synchronous", refers to two or more individuals or parties attempting to be placed in the same instance in cases where parties or groups are supposed to be formed randomly. This is done by synchronizing each player's clicking of the "Enter Battle/Mission" button. There are four places in Guild Wars where syncing can occur:
 * In the Random Arena or in a Competitive Mission, players sync in order to be placed on the same team.
 * In an Alliance Battle, multiple groups of four players can sync in order to enter the same instance.
 * In the Vizunah Square and Unwaking Waters missions, parties in opposite outposts can sync in order to enter the same instance.