The term "Generation 1" is a retronym; the series was simply known as "Transformers" until the release of the "Generation 2" series. However, the term has become semi-official, as both Hasbro and Takara have referred to this era as "Generation 1". New characters are still occasionally added to the line, primarily by E-hobby. (Examples: Sunstorm, Hauler, Detritus, and the like.) Large-scale production of new characters in this line ended with the onset of Generation 2. Transformers fans often are very upheld with the G1 community. This has led to controversy among fans who consider G1 to be the only "pure" form of Transformers.