High Quality Content by WIKIPEDIA articles! A character class is a fundamental part of the identity and nature of characters in the Dungeons & Dragons role-playing game. A character`s capabilities, strengths, and weaknesses are largely defined by his or her chosen class; choosing a class is one of the first steps a player takes in order to create a Dungeons & Dragons player character. A well-rounded party of characters requires a variety of abilities offered by the diverse classes in the game. Dungeons & Dragons classes have generally been defined in the Player`s Handbook, one of the three core rulebooks; a variety of alternate classes have also been defined in supplemental sourcebooks.