The Digimon series has a large number of video games which usually have their own independent storylines with a few sometimes tying into the stories of the anime series or manga series. The games consists of a number of genres including life simulation, adventure, video card game, strategy and racing games, though they are mainly action role-playing games. The games released in North America are: Digimon World, Digimon World 2, Digimon World 3, Digimon World 4, Digimon Digital Card Battle, Digimon Rumble Arena, Digimon Rumble Arena 2, Digimon Battle Spirit, Digimon Battle Spirit 2, Digimon Racing, Digimon World DS, Digimon World Data Squad, Digimon World Dawn and Dusk, Digimon World Championship, and Digimon Masters.
What usually follows the anime storyline?