Marathon: Aleph One I had no idea that Bungie released the Marathon source to the community, and I certainly had no idea there was a way to play Marathon on a Mac OS X/Windows/Linux machine at this point. On a similar note, did anyone else notice that the opening scene in the first board of Halo (the best game for the Xbox, and the one that made me actually get an Xbox) is sort of the same one from Marathon 2?