Nobody has mentioned the A:R back spines.... It's not that I'm not gonna want to play this game, it's just they are soooo close to a perfect aliens game for the first time ever and they don't go all the way...
1. Better or very little voice acting done by actors that don't do video games...
2. insect like movement instead of panther/jungle boy grace.
3. design accurate to the film they are basing the game on.
4. no crawling on the ground./ in wide open spaces/ broad daylight
5. single player mode without being followed around by ai marines shooting what you are aiming at/ getting in your way.
Other than that stuff it looks pretty dang exciting.