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.
Highlights for this release include Lua persistence, a network stats display, and joystick support (from Eric Peterson). Jeremiah Morris has also joined us to add terminal and classic HUD scaling, as well as a new customizable HUD; and Solra Bizna added gamma-corrected alpha blending. This version is for OS X 10.2.8 and up