Alien forces have boarded the colony ship UESC Marathon in the Tau Ceti system, in orbit around humanity’s first interstellar colony. The situation is dire, and as a security officer assigned to the Marathon, your duty is to defend the ship and its crew from the alien threat.

This classic 1994 Bungie™ FPS had a foundational influence on the genre, and is now maintained by the fan community. Experience authentic game play using the original data files, with optional widescreen HUD support, 3D filtering/perspective, positional audio, and 60+ fps interpolation, just in case the original is too authentic.

Classic Marathon is powered by the Aleph One engine, which is available under the terms of the GNU General Public License (GPL) Version 3.