Dungeons & Dragons Online (DDO) is a massively multiplayer online role-playing game (MMORPG) developed by Turbine, Inc. for Microsoft Windows and Macintosh personal computers. The game was originally marketed as Dungeons & Dragons Online: Stormreach, then renamed Dungeons & Dragons Online: Eberron Unlimited upon switching to a hybrid free to play model, and was finally rebranded Dungeons & Dragons Online, with the introduction of Forgotten Realms-related content. DDO lets players choose to roll characters from the usual list of fantasy races, such as Elves, Dwarves, and Halflings, but also introduces some new playable races to the MMORPG genre, such as the Warforged, Half-Orc, and Drow. Many familiar classes are also included, such as Fighter, Ranger, Rogue, and Wizard, and DDO also allows multiclass characters, and for Prestige characters, such as Warchanter (Bard), Kensai (Fighter), Knight of the Chalice (Paladin), and many others. Quests in DDO are organized by character level, difficulty, length, and patron. Each quest has a base level, with the XP reward lessened if any of the party members are above that level. Characters more than two levels below the "base level" are not allowed to initiate a quest, but they are able to join a quest started by another party member. Characters more than three levels below the highest level character are penalized for being "powerleveled", and get significantly less XP.