Enigma

Enigma is a transport puzzle video game based on Oxyd, and is released under the GPL. Enigma continues to be very popular as an open source multi-platform derivative of Oxyd now that Oxyd is no longer maintained. The open source fangame Enigma has been praised in reviews.

Enigma is a marble game. Landscapes usually take the form of logic puzzles, although frequently, dexterity with the pointing device (the only form of input) is also required. The game is based on a traditional square grid map (2D computer graphics) and a realistic physics simulation.

Enigma is compiled for Mac OS X, GP2X, Microsoft Windows, FreeBSD and Linux (with packages available for several distributions).