Proteus is an adventure game developed by Ed Key and David Kanaga, and published by Twisted Tree. The walking simulator offers open world exploration in an artistically rendered environment. Every location plays a different soundtrack that can bring ranges of emotions. Players can discover plains, forest, valleys, islands, bodies of water and ruins. There are no dangers or threats that would stop players from discovering more places. Players are encouraged to watch the weather, the sky and the nature to unwind and relax. They can meditate with the virtual environment and the soundtrack. Everything is procedurally generated so every session is unique. The game comes with the "postcard" function for taking screenshots.