Dungeons and Dragons (or D&D) have been around for more than 30 years. Originally created by a small group of people, the game since had many revisions, and expanded to include fantasy and modern genres alike. Other games were created with the basics of D&D in mind.
To play traditional Dungeons and Dragons, players create a character for the world they wish to play in, using dice to help create the character, and to determine the outcome of situations such as whether they hear the goblin or whether they are successful at picking a lock.
For more in depth information about Dungeons and Dragons, please visit Wizards of the Coast.
For more information about the world of Dragonlance, please visit their official site.