Aleph One is the open source continuation of Bungie’s Marathon 2 game engine. Available for Mac OS X, Windows, and Linux, Aleph One supports Marathon 2 and Marathon Infinity natively, and Marathon through a fan-made conversion. Many third party scenarios and net maps are also available.

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Marathon: Alien forces have boarded the interstellar colony ship Marathon. The situation is dire. As a security officer onboard, it is your duty to defend the ship and its crew.

Experience the start of Bungie’s iconic trilogy with Marathon. This release is a meticulous conversion of the original game to the Aleph One engine, with many details and battles restored that were missing from the earlier “M1A1” release.

Marathon 2: Fresh from your triumph on the starship Marathon, you are seized by the rogue computer Durandal to do his bidding in a distant part of the galaxy. Within the ruins of an ancient civilization, you must seek the remnants of a lost clan and uncover their long-buried secrets. Battle opponents ancient and terrible, with sophisticated weapons and devious strategies, all the while struggling to escape the alien nightmare…

This release of Marathon 2: Durandal includes the classic graphics, and revamped high-definition textures and monsters from the Xbox Live Arcade edition.

Marathon Infinity takes the closed universe of the Marathon series and blows it wide open. The solo/co-op campaign, “Blood Tides of Lh’owon,” is a 20-level scenario sporting new textures, weapons, and aliens. More than that, the scenario sheds a surprising new light on the story’s characters and the meaning of events. Having defeated the Pfhor and reawakening the ancient remnants of the S’pht, the player now faces a world where friends become enemies and all is not what it seems…

Marathon Infinity is the most popular Marathon game in online play, and is compatible with hundreds of community-made maps. This release includes the classic graphics, and revamped high-definition textures and weapons.