Marathon: Durandal

Maybe we'll see the other two games come to Xbox as well...

Marathon 2: Electric Boogaloo is much better than the first game, the lore here is fascinating and the gameplay is fun here. The only downside is the lack of music.

Halo before halo lol awesome boomershooter with full txt based storyline and huge levels for the 90s

The chief lives

Well, technically, this was the second Marathon entry. Having played all three as they originally came out on the Mac by what was the best game studio out there. (Which is why MS bought Bungie and Halo - once previewed for the Mac... became the launch title of Xbox.) Anyhow - this was then, and still is an amazing game with an amazing SINGLE PLAYER campaign that is missing from the remake. I only wish the first Marathon and Marathon Infinity would be ported as well. (But this one was ported to PC - I don't think the other two were.)