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Marathon cover art
Marathon. Marathon screenshot, via IGDB. Unofficial site, not affiliated with the publisher.
PC port · Mac OS → PC

Aleph One (Marathon trilogy engine)

The open-source continuation of Bungie's Marathon 2 engine, which plays Marathon, Marathon 2 and Marathon Infinity on Windows, Mac and Linux. Ready-to-run downloads include the games for free.

WorkingSource portNo game files neededrelease-20260930Updated
What you need

Nothing to buy: the Aleph One site offers ready-to-run downloads of Marathon, Marathon 2 and Marathon Infinity for Windows, macOS and Linux, with the game data included.

Official releases ↗GitHub repository ↗

We do not host any files. Only download from the project's official source.

Every version of Marathon 2

  1. Aleph One (Marathon trilogy engine)This page

    WorkingSource port

    Aleph One is the open source continuation of Bungie’s Marathon 2 game engine.

    Runs on Windows (64-bit and 32-bit), macOS, Linux (Flatpak and source)Needs nothing★ 820release-20260930 · Oct 1, 2026

    Website ↗

We link to each project's own page and host no game files. Version data from project pages, our daily checks and awesome-decomp-games (CC0).

Short answer

Aleph One is the open-source continuation of Bungie’s Marathon engine, and plays Marathon, Marathon 2: Durandal and Marathon Infinity on Windows, macOS and Linux. The official site offers ready-to-run downloads with the games included, for free. Latest release: release-20260930, 1 October 2026.

This site is not affiliated with Aleph One or Bungie. We do not host any files and only link the project’s official pages.

What it is

Bungie’s Marathon (1994), Marathon 2: Durandal (1995) and Marathon Infinity (1996) were Mac first-person shooters, the forerunners of Halo. In 2000 Bungie released the source code of the Marathon 2 engine, and later made the trilogy’s data freely available.

Aleph One “is the open source continuation of Bungie’s Marathon 2 and Marathon Infinity game engines. Aleph One plays Marathon, Marathon 2, Marathon Infinity, and third-party content on a variety of platforms” (Aleph One README).

Current status

  • Status: Working, actively maintained; last updated on 31 October 2026.
  • Latest release: release-20260930, 1 October 2026, for Mac, Windows (64-bit and 32-bit), Linux Flatpak and source.
  • Ready-to-run games: the README points to alephone.lhowon.org “to download ready-to-run versions of all three Marathon games for macOS, Windows, and Linux Flatpak”. They are also on Steam.

What you need

Nothing to buy. Download the game you want from the Aleph One site and run it. A Windows, Mac or Linux computer is enough.

How to start

  1. Go to alephone.lhowon.org and download Marathon, Marathon 2 or Marathon Infinity for your system.
  2. Unpack and run it; the engine and the game data come together.
  3. Adjust graphics (OpenGL renderer, resolution, field of view) and controls in the preferences.
  4. Play the campaign, or join and host network games.

Beyond the trilogy

Aleph One also runs a large library of community scenarios and total conversions, listed on its site. Modern features include an OpenGL renderer with high resolutions and widescreen, mouselook, Lua scripting and networked multiplayer.

FAQ

Can I play Marathon for free?

Yes. The Aleph One website offers ready-to-run versions of Marathon, Marathon 2 Durandal and Marathon Infinity for Windows, macOS and Linux, and the games are also available free through Aleph One on Steam. Bungie released the trilogy for free play years ago.

What is Aleph One?

The open-source continuation of the engine Bungie used for Marathon 2 and Marathon Infinity, released by Bungie in 2000. It plays all three Marathon games and third-party scenarios on modern systems.

Does Aleph One have multiplayer?

Yes. Aleph One supports networked multiplayer, including the classic Marathon net games, and has an active community.

What is the latest Aleph One version?

On 3 November 2026 the latest release was release-20260930, published on 1 October 2026, with builds for Mac, Windows (64-bit and 32-bit), a Linux Flatpak and source.

Is there Aleph One for Android or iPhone?

Not officially. An older community Android port exists but is inactive.

Unofficial. This page is written by an independent directory. It is not made by, endorsed by or affiliated with Bungie or Aleph One developers (Aleph One (Marathon trilogy engine)'s author). We do not host any files, and we never link to game files, ROMs or ISOs.

Sources

This page was last updated on Nov 3, 2026. A date after a source is the day we read it. Versions and steps follow the official project; if they differ, the official source wins.

More ports

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