The first Guild Wars campaign hit the stores in April 2005Two additional campaigns and an expansion pack, Eye of the North, were released within the two years that followedAs of April 2009, over 6 million copies of Guild Wars campaigns had been soldThere are considerable differences from one campaign to the next, and anyone considering purchasing a campaign by itself should know the differences beforehandHowever, for players who want to try them all, the three campaigns are available as a bundle in Guild Wars Trilogy.
Guild Wars Professions
Each campaign has a slightly different set of playable professionsA profession is the area of combat or spell-casting that a character excels inGuild Wars Prophecies offers six professions, which are the core professions for each campaign:
- Warrior
- Ranger
- Monk
- Elementalist
- Necromancer
- Mesmer
The other two campaigns each contain different additional professionsGuild Wars Factions includes the six core professions along with Assassins and RitualistsGuild Wars Nightfall brings the addition of the Paragon and Dervish professions.
Sources : Online Game Zone