Aleph One, a community project, has worked on an "open source continuation of Bungie 's Marathon 2 game engine" for several years. Bungie's classic 1990s trilogy�consisting of Marathon, Marathon 2 and Marathon Infinity�is natively supported on the Aleph One platform (on macOS, Windows, and Linux). The first entry (1994) in the series debuted on Mac systems�Bungie stayed loyal to Apple OS ecosystem