This paper examines the Saudi voting system and its effects on the first nationwide municipal elections held in the Kingdom in 2005. It argues that by encouraging electoral mobilization across districts, the voting system impacted on both the dynamics of the election campaign and its outcome. Drawing on original research conducted in the country, it is demonstrated that, as designed, the rules of the electoral game (1) made possible the formation of electoral alliances, whose presence on the ground gave the entire campaign a distinctly ideological flavour; and (2) facilitated the remarkable victories of Islamist candidates in municipalities across the Kingdom.