Campaign

A "campaign" (or "chapter" - see notes) is what the developers of Guild Wars, ArenaNet, call a major expansion of the Guild Wars game series. Each of the first three campaigns is stand-alone and does not require any previous campaigns of Guildwars to play, and must be purchased separately, as a full game, although they can be "linked" to a single account, allowing characters to travel between campaigns. The fourth campaign, Eye of the North, will be an expansion rather than a standalone.

Each campaign adds large amounts of new content, but also includes common core content present in all campaigns.

ArenaNet has stated that they plan to release two campaigns per year, and each campaign will have a development time of about 1 year.

During installation the player may choose whether he or she wants to keep his or her accounts for separate campaigns separate or if he wants to "link" (merge) them.

Campaigns so far:
 * Campaign Zero: Core content shared by all campaigns, was patched into the game in the January 19th, 2006 major update.
 * Campaign One: The original Guild Wars, a.k.a. Guild Wars Prophecies, released April 28, 2005.
 * Campaign Two: Guild Wars Factions, released April 28th, 2006.
 * Campaign Three: Guild Wars Nightfall, released October 27th, 2006.

In addition, AreaNet has produced the following expansions for Guild Wars:
 * Eye of the North, expected to be released in the second half of 2007.