class is a profession or chosen field of study. While a character's race defines which classes and class combinations are open to a character, his classes define the proficiencies that are available to him, the levels at which they become available, and his starting ability at them. Essentially, race is what a character is born to, and class is what he chooses to become.

Every class has a different range of skills, and every spell-casting class has a different range of spells. There is some overlap between classes, but almost every class has at least some abilities, whether skills or spells, that are unique to it alone.

There are currently fourteen classes on Mozart Mud. Every race has access to at least two, and usually many more; only humans can be any of the fourteen, but even they do not have access to every multi-class combination.

 character must choose whether to be single-classed, advancing in one class only, or multi-classed, splitting his focus between two different classes, while he is being created. This is an important decision, greatly impacting his future life—while a single-classed character is better at what he does, a multi-classed character can do more things.

A single-classed character gains a number of advantages from his single-minded dedication. He can learn his proficiencies to a 10% higher maximum than multi-classed characters, and he also gains adepts more quickly. Additionally, he tends to gain more hit points than a multi-classed character when he gains levels, as the roll is made twice and the better one retained. Single-classed spell-casters gain their full mana regeneration, unaveraged with that of a mundane secondary class. All single-classed characters also learn a total of twenty specialties over their careers. Single-classed characters can advance to higher levels more quickly, since they only need to gain experience for one class. Lastly, certain races, such as aludemons and half-giants, are normally unable to multi-class.

Multi-classing's main advantage is versatility: a character with two classes has all of the skills, spells, and other abilities from each available to him. However, he pays a price for his broad knowledge: his divided attention causes him to gain adepts more slowly than single-classed characters. Furthermore, all of his skills, spells, and other proficiencies can only be learned to a reduced maximum of 10% lower than normal. He will gain only half the number of hit points each time he gains a level than a single-classed character; while he will gain twice as many total levels as a single-classed character, this still results in fewer overall hit points due to rounding. Similarly, he will only gain one attribute point when he gains a level instead of two. Multi-classed spell-casters' mana regeneration is averaged over both their classes; while this isn't a particular hardship for e.g. a cleric/shadowmage, it means a mage/warrior will get his magical power back at half the normal rate. Finally, multi-classed characters only learn a total of ten specialties.

The following classes are available:

	Antipaladin:	Sinister, unholy blackguards
	Arbiter:	Holy champions of the Gods of Neutrality
	Barbarian:	Unparalleled, but superstitious and uncivilized, combatants
	Cleric:	Holy priests, specializing in healing and defensive magic
	Druid:	Guardians of nature
	Inquisitor:	Holy champions of the Gods of Evil
	Mage:	Practitioners of wizardry
	Monk:	Ascetics who seek harmony between mind and body
	Paladin:	Holy champions of the Gods of Good
	Ranger:	Lone warriors of the woodlands
	Shadowmage:	Dark practitioners of questionable sorceries
	Thief:	Sneaks and cutpurses
	Warrior:	Masters of hand-to-hand combat
	Warriormonk:	Specialists in barehanded fighting styles