Marathon 3.3

Marathon is a fight for survival against the Pfhor, an alien race attacking your colony ship. This fan-made conversion known as M1A1 brings the start of the Marathon trilogy to Aleph One. Aleph One is the open source continuation of Bungie's Marathon 2 FPS game engine. Aleph One plays Marathon 2, Infinity, and 3rd-party content on a wide array of platforms, with (optional) OpenGL rendering, Internet play, Lua scripting, and more.