In Legend of Grimrock, you can choose from four races and three classes.

During character creation, you can choose to use a pre-made party, or you can build and customize your own party, choosing race, class, traits, abilities and skills for your characters.

The descriptions below are taken from the game manual:

Races

HUMAN. The most populous of the sentient races in the world, humans see themselves as the keepers of order and peace but not all the other beings agree with their definition of laws or where the borders of nations are drawn.

MINOTAUR. Unlike humans, Minotaurs don't associate power with wealth or aristocracy but with strength and feats of bravery. They are often found in places where they are most likely to cause problems like in overcrowded port cities and in the legions of warring nations. Minotaurs are tolerated in the cities only because of their ability to do hard labor without rest as long as beer and meat is provided.

LIZARDMAN. Lizardmen prefer to live in the vast deserts, woods and swamps of the realm but during times of severe drought or when the realm has been ravaged by wars, some of them have been forced to flee to human cities where they often end up as beggars and petty criminals. Humans usually don't trust them and lizardmen are often viewed as being capricious and deceitful.

INSECTOID. Because insectoids mostly keep to themselves and they rarely wander into the lands populated by other races, very little is actually known of their culture or history. People often rumor of hidden underground insectoid cities and great libraries filled with arcane knowledge.

Classes

FIGHTER. From the primitive barbarian warriors to the highly trained legionary soldiers and noblemen in search of honor, fighters come from all walks of life and ranks of society. They are trained to use a variety of close combat weaponry and armors.

MAGE. Studying arcane knowledge lets mages tap into the forces of nature and elements and form them into powerful spells.

ROGUE. Rogues are the masters of stealthy combat and ranged weapons. Some rogues are common thieves while others are deadly dagger-wielding assassins or noble huntsmen