What is Aleph One
Aleph One is the open-source continuation of Bungie’s Marathon 2 game engine. Available for Mac OS X, Windows, and Linux, Aleph One supports Marathon, Marathon 2 and Marathon Infinity natively. Many third-party scenarios and net maps are also available.
Up to 8 players can participate in multiplayer matches or co-op play. All multiplayer games are peer-to-peer and work over a LAN or if the host is configured properly, over the Internet. You can find and chat with other players in Aleph One’s global matchmaking lobby.