Like the main series, "Dragon Quest Monsters" was originally released under the "Dragon Warrior" name in the US. The next game, "Dragon Warrior Monsters 2", is the only game to be split into two versions, "Cobi's Journey" ("Ruka's Journey" in Japan) and "Tara's Adventure" ("Iru's Adventure in Japan"), named after the main player characters. Each version has slight differences, such as the monster that appear in them. ' is a prequel to "Dragon Warrior VII", following Keifer who is pulled into Torland and must find the six Orbs of Loto in order to return. The release of ' is the first spin-off title to be released in English using the "Dragon Quest" name; its sequel "" was released in North America in September 19, 2011. There is also an Android title, "Dragon Quest Monsters: Wanted!".