The success of Beast Wars and the change in storyline resulted in its second phase: Beast Machines. Like Beast Wars, the name Transformers was used only as a secondary title. While still a success, the storyline and direction borne by Beast Machines was questioned and criticized by the most ardent fans who knew the previous history of the Transformers. Also, there was a clamor for a return to the original idea of the Transformers, that of their being protean robots with nearly humanlike artificial intelligences who transformed into vehicles or devices.