The series has been critically acclaimed, with all the main 3D entries in the franchise frequently ranked among the greatest and best selling video games;[4] it has shipped more than 350 million units, making it the fifth-best selling video game franchise. In 2006, Grand Theft Auto was featured in a list of British design icons in the Great British Design Quest organised by the BBC and the Design Museum.[2] In 2013, The Telegraph ranked Grand Theft Auto among Britain's most successful exports.[6] The series has also been controversial for its adult nature and violent themes.