 Proteus is an open world exploration video game developed by Ed Key and David Kanaga for Linux , Mac OS , Microsoft Windows , PlayStation 3 , and PlayStation Vita . The game was released on 30 January 2013 for Windows and Mac , and on 8 April 2013 for Linux . PlayStation 3 and PlayStation Vita versions were later released on 29 October 2013 . The game is based around adventuring and discovering an island , with no specific goals . Players explore an environment in which every creature and plant has a unique musical signature , which results in changes in audio depending on the area . The game world is procedurally generated , creating a unique layout each game . 
