Aleph One
Game Engines & FrameworksOpen-source engine for the Marathon trilogy with multiplayer
Replaces Marathon original
Marathon original is a popular proprietary tool in the game engines & frameworks space. These open-source apps let you replace Marathon original with software you host and control yourself.
Moving off Marathon original means trading a managed subscription for a service you run yourself. The payoff is ownership: no per-seat pricing, no vendor lock-in, and full control of your data. Start with the option above that matches your setup-difficulty comfort level — every app links to a detailed specs page and head-to-head comparisons.