According to Xbox-Achiv, the USK (aka the German ESRB) has rated Marathon: Durandal. (Link to the Google translated version)

Marathon, if you haven't already wet yourself with glee, is a classic Bungie franchise. (Yeah, they actually made games before a man in green armor changed everything.)

Marathon originally debuted in 1994 on the Macintosh and completed the trio of releases in 1996. If you want to know way too much about it, start with the Wiki. In fact, there's apparently two Wikis. Halo owes much of its genesis to Marathon, so all you Halo junkies, get to learnin'.

The smart money puts this game as a downloadable through Xbox Live Arcade but I am sure this one will be held close to the vest until it is ready for primetime. Maybe a min-E3 announcement? We shall see.

[via xbox-achiv, thanks Wasabi] [original German language link]