Metroid is a franchise currently owned by GameProStudios.

Metroid (メトロイド Metoroido?) is a series of science fiction action-adventurevideo games by Nintendo. It chronicles the missions of space-faring bounty hunter Samus Aran, who protects the galaxy from the depredations of theSpace Pirates and their attempts to harness the power of the eponymousMetroids.[1] Metroid combines the platforming of Super Mario Bros. and the exploration aspect of The Legend of Zelda with a decidedly darker atmosphere and a greater emphasis on nonlinear gameplay.

As of 2011, the Metroid series consists of eleven games, with releases on every Nintendo home and portable console except the Game & Watch, Nintendo 64,Virtual Boy, Game Boy Color, 3DS, and Wii U (although the latter two allow users to download older Metroid titles). As well as being one of Nintendo's most financially successful franchises with over 17.44 million games sold as of September 2012,[2] it is also one of the company's most highly acclaimed series, with a GameRankings average score of 85% across all eleven titles.