Enigma is a computer game based on Oxyd, and is released under the GPL. Landscapes usually take the form of logic puzzles, although frequently, dexterity with the pointing device (the only form of input) is also required. The landscapes are generated by scripts in the Lua programming language, making the creation of complicated landscapes relatively easy. A level editor exists, but it is currently not used very much.

As well as the 563 standard landscapes designed for it, Enigma also includes 20 tutorial landscapes, 149 landscapes adapted from various Sokoban games, 151 landscapes adapted from the Oxyd games, and 91 landscapes adapted from Oxyd's predecessor, Esprit. This makes a total of 974 landscapes.