AdventureQuest Worlds

AdventureQuest Worlds, often shortened to AQWorlds or simply AQW, is a browser-based MMORPG or massively multiplayer online role playing game developed by Artix Entertainment in 2008.

Unlike most massively multiplayer role playing games, AdventureQuest Worlds was developed entirely in Adobe Flash. It currently has over 22 million registered accounts, reaching 6 million in May and 9 million in July 2009.