Proteus

Proteus is a 2013 adventure game designed and created by Ed Key and David Kanaga for Microsoft Windows, OS X, Linux, PlayStation 3, PlayStation 4 and PlayStation Vita. In the game, the player traverses a procedurally generated environment without prescribed goals. The world's flora and fauna emit unique musical signatures, combinations of which cause dynamic shifts in audio based on the player's surroundings. The game began development in 2008. Key first conceived Proteus as an open-ended role-playing game akin to The Elder Scrolls IV: Oblivion but, because of the work required for such a project, later redesigned it to be "nontraditional and nonviolent".