Enigma is a puzzle game released in 2014 designed and developed by Enigma dev team. Enigma can be described as a full free, open source game and can be played on the following operating systems: Windows, Mac OSX.
“Enigma is a puzzle game inspired by Oxyd on the Atari ST and Rock'n'Roll on the Amiga. The object of the game is to find uncover pairs of identically colored Oxyd stones. Simple? Yes. Easy? Certainly not! Hidden traps, vast mazes, laser beams, and, most of all, countless hairy puzzles usually block your direct way to the Oxyd stones.” - Enigma dev team