Aleph One (formerly known as the Marathon Open Source Project) is a free and open-source first-person shooter engine based on the source code of Bungie Studios' Marathon 2: Durandal. The project commenced in early 2000, when Bungie released the code shortly before being acquired by Microsoft and spurred the fan community to further develop it. Since that time, Aleph One has become a successful project in terms of development and community support. Most modern-day and die-hard Marathon enthusiasts use Aleph One due to its enhancements over the original games and the fact that it is playable with today's platforms. Its name is taken from the second infinite cardinal number in transfinite arithmetic and references Marathon Infinity, the final game in the Marathon Trilogy.

Statistics
How it works

The statistics above update daily and provide insight into how well articles, files, videos, images and other content you post is affecting the popularity of your engine. If you wish to track these statistics on your homepage, blog, facebook or even in news and forum posts here, use the embed code provided.

Please note: all content linked with your profile including archived downloads, news etc is still being tracked and included on the above graph even if it isn't mentioned.

Boost your statistics

We recommend you link to your engine profile on your homepage, blog, forum and other communities you are a member of like Facebook and X. To help you do this you can copy and paste any of the share options code provided, or check out our mediakit.