The first projects published by the studio in 1999 were anime adaptations of video game franchises popular in Japan: "PoPoLoCrois", "Arc the Lad", "", and "Medabots". Later, Bandai Visual joined forces with Bee Train to produce an anime OVA based on the famous .hack video game series. Simultaneously, they decided to promote the games with an anime television series, that aired in 2002 as ".hack//Sign" and is among Bee Train's most famous works. The OVA became known as ".hack//Liminality" and its four episodes were added as bonus material to each of the original four games of the franchise. In 2006, Bee Train produced ".hack//Roots", a prequel anime to the ".hack//G.U." games and a spiritual successor to "Sign".