Mabinogi (Korean: ????) is a massively multiplayer online role-playing game released by South Korean Game Distributing Company Nexon, and developed by devCAT studio. Although the name of the game is taken from the Mabinogion, a Welsh anthology of legend, the settings for the game are loosely based on Irish mythology.

The game engine features hand-painted textures stylized with edge detection outlining. The game world is developed continuously, through the release of important updates (referred to as "Generations" and "Seasons") that introduce new areas, additional features such as pets and new skills, and advancement of the storyline. The user interface is simple and designed in the likeness of Microsoft Windows' task bar.