Commander Genius is an open-source interpreter for the Commander Keen (1-6, Dreams) and Cosmos Cosmic series which allows you to play the original episodes and some of the mods made for them. All of the original data files are required to do so, however, we conveniently provide a online store where you can get some of the games, including Keen 1, 4, Dreams and Cosmos 1 for your enjoyment. There are also mods that can be downloaded directly. Of course you still have the option to use your old ori