Metroid is an action-adventure video game, and the first entry in the Metroid series. It was co-developed by Nintendo's Research and Development 1 division and Intelligent Systems, and was released in Japan in August 1986, in North America in August 1987, and in Europe in January 1988. The game was re-released for the Game Boy Advance in October 2004, and for the Wii Virtual Console in Europe in July 2007, in North America in August 2007, and in Japan in March 2008. Metroid was produced by Gunpei Yokoi, directed by Satoru Okada and Yoshio Sakamoto, and had music composed by Hirokazu Tanaka. Set on the planet Zebes, the story follows Samus Aran as she attempts to retrieve Metroid creatures that were stolen by Space Pirates, who plan to replicate the Metroids by exposing them to beta rays and then use them as biological weapons to destroy Samus and all who oppose them.