Dungeons & Dragons Online: Stormreach (abbreviated as "DDO") is a massively multiplayer online role-playing game (MMORPG) developed by Turbine, Inc. Turbine developed DDO as an online adaptation of Dungeons & Dragons (abbreviated as D&D) based loosely on the D&D 3.5 Ruleset and set in the Eberron campaign setting.

DDO is set on the fictional continent of Xen`drik, in the world of Eberron. The world of Eberron is a campaign setting, developed by Keith Baker for Wizards of the Coast. Players can create their characters following the revised edition of D&D 3.5 rule-set fashion, and play them in both indoor and outdoor environments, including a large variety of dungeons. The core of the game is set in the city of Stormreach, a giant-scaled city built eons ago, and recently settled by humans. There are a number of areas within Stormreach - the Docks, the Harbor, the Marketplace and the four Dragonmarked Houses - House Deneith, House Jorasco, House Kundarak and House Phiarlan. In addition, there are a number of adventures that are taken beyond the city walls, into distant lands such as Tangleroot Gorge, Threnal, Three Barrel Cove and Sorrowdusk Isle, each home to one or more adventures of their own.

Standard parties can be up to 6 characters, and Raid parties are up to 12 characters. Characters gain experience by completing quests. Killing monsters will usually increase the size of the experience reward, but are not always central to the reward. In some cases, simply running through a quest from one end to the other will grant an XP reward.

DDO supports solo play, including a special "Solo" level of difficulty on many quests. But a more typical party consists of multiple characters filling roles such as "tank" (fighters, paladins, or barbarians), healer (clerics), caster (wizard or sorcerer), "flank" (rangers, fighters, monks) or "support" (bard or rogue).

Platemail is one of the heavier armours available in Dungeons and Dragons Online