European retro-futuristic sci-fi

This style is European retro-futuristic sci-fi, clearly inspired by the French sci-fi bande dessinée school of the 70s and 80s. The most obvious references are Jean Giraud, especially his work in Arzach or The Long Tomorrow, Enki Bilal, and Philippe Druillet. It also carries echoes of the industrial design language of Syd Mead.