Rappelz is a free-to-play massively multiplayer online role-playing game. The game is developed by the Korean company nFlavor, and published by the Californian company Gala-Net Inc. Although Rappelz is free-to-play, revenue for the game is gained through sale of special items in the Cash Shop. The game is set in a medieval fantasy world, dominated by three races: the Deva, who represent light, the Asura, who represent darkness, and the Gaia, humans that possess an affinity with nature.