Enigma

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 … If you are new to Enigma, you may want to take a look at a few screenshots or peek at the user manual. Enigma is available for Windows, Mac OS X, and most flavors of Linux and other modern Unices. Enigma is free software and may be distributed and modified under the terms of the General Public License.

enigma.nongnu.org