10000000 ("Ten million") is a hybrid puzzle-role-playing game developed by Luca Redwood under the company name EightyEightGames, released initially for iOS in August 2012, and later for Microsoft Windows and Mac OS X via Steam in January 2013, and to Android and Linux systems in March 2013. Redwood released a sequel, You Must Build a Boat, for Windows, OS X, iOS, and Android on June 4, 2015.