Jason Rohrer is a computer programmer, game designer, writer and musician. He publishes most of his software under the GNU GPL or into the public domain, and charges for the iPhone ports of his games, which include TRANSCEND, PASSAGE, GRAVITATION and BETWEEN. In 2016, the Davis Museum at Wellesley College exhibited The Game Worlds of Jason Rohrer, the first museum retrospective dedicated to the work of a single video game maker.