TRI: of Friendship and Madness (GOG) 2.0.0.1

TRI's official site: http://www.tri-game.com/

Find a way through the towers and dungeons of TRI by solving puzzles, climbing impossible ascents and reflecting light-rays. The mystical TRI will let you create your own paths in this strange world – just try not to lose your mind when you're falling upside down!