According to the most recent issue of Game Informer, both Bungie (Halo) and Bizzarre Creations (Project Gotham Racing) have split with Microsoft. Microsoft owns the rights to Halo, but Bungie still has the rights to Marathon.
Originally Posted by dazada
Marathon takes place 241 years after the events of Halo 3. Later in the first Marathon, the main character is revealed to be a SPARTAN-IV, (though Master Chief is a SPARTAN-II). Most of the weapon classifications of Marathon and Halo are the same, and the Marathon logo can be found in Halo (though this is probably just a "cameo" of sorts by Bungie).
Do the brown and green arms look familiar?
The protagonist (check out the visor)
Try and tell me these guys dont look like certain "spore-infected Marines"
You can download the full version of Marathon 2: Durandal (with WAY updated graphics no less) from Xbox Live Arcade for about $10. It's a pretty good game for its age.
Comparison between the original and updated Marathon 2