Up to now science has failed to identify what makes up to 85% of the matter of the Universe. Elucidating the nature of dark matter constitutes a key challenge in modern physics. MultiDark is a Spanish Project supported by the Consolider-Ingenio 2010 Programme of the Ministry of Science and Innovation, in which experimental and theoretical physicists, astrophysicists and cosmologists join efforts to take up this task from a multidisciplinary perspective.