As further celebration of Marathon's tenth anniversary, James Willson has added code to Aleph One enabling users behind NAT firewalls to join TCP/IP network games. Test Windows and Mac versions are being hosted by Gregory Smith.
Forrest Cameranesi has released the "penultimate version" of the long-in-production scenario Eternal, an unofficial sequel to Marathon Infinity. (What's next, Duke Nukem Forever? --Ed.)