I was gutted when Bungie was bought by MS. It was the end of the Marathon series which was a killer Mac game. Story, puzzle, action (that grenade launcher, dual shotguns...). I have never played Halo, but if it carried on anything like the experience Marathon had I really should.
I think Bungie deciding to no longer make Marathon games killed the Marathon series. By the time they were bought by MS they already moved on to other genres with games like Myth, Myth 2, and Oni. Plus, Halo was in development for years before they got bought.
