A profession is a type of class commonly found in most RPGs and is central to the gameplay in Guild Wars. Each profession has an array of attributes and skills that help narrow a class’s proficiency in order to perform a customized role that is determined by the player. The Warrior profession, for example, has access to the primary Strength attribute that increases their armor penetration with martial weapons, and is able to wear heavy armor providing the highest protection against physical damage of all professions. Elementalists, on the other hand, wear less protective armor, but can use their primary Energy Storage attribute to give them a much greater pool of energy than other professions.

Guild Wars also introduces the ability to choose a secondary profession, expanding the selection of attributes and skills. A character does not, however, have access to the primary attribute of its secondary profession. Many, but not all, skills become more powerful with more points in a class’s primary attribute. A Warrior/Elementalist, therefore, is a warrior who may use spells in combat, although the Elementalist spells used will generally not have as much power as those of a primary Elementalist. This is increased by the fact that runes, which among other things increase attribute levels, can only increase the attribute levels associated with a player’s primary profession.