As promised the A:CM Blurb from OXM
This was an interview question with Randy Pitchford of Gearboax
OXM: You've Worked on Halo, and now Duke. Any other big names on your bucket list?
Randy: Hey! You didn't mention Half Life! We created all of the Half Life exapansions and console versions, remember? More seriously, one thing that's already been annouced that we haven't talked a lot about is our Aliens game with Sega. We're really committed to making sure it's the kind of game we always hoped would be made with respect to the films. You know... Halo, Duke Nukem and Half Life borrowed a lot of influences frome Aliens. From Half Life's head crabs, to the alien life-cycle in Duke Nukem, to the drop ships and space marines in Halo, Aliens has had tremodous impact and influence on game makers, including me.
Not a lot of info but enough.