Yes, this is not that different from previous versions - but it's still well done and entertaining. Once you get the controls right, getting through the game is not that challenging. Upgrading health and oxygen mask to the top helps to maintain your character alive, allowing you to focus on enemies. Ammo runs out very fast, so get used to the idea of using knife instead. When accompanied with supporting fighters, let them waste ammo, stand back and join the fight only if the enemy starts seriously damaging your allies - since with them, getting through levels is much easier. I never bothered using/buying any other guns than shotgun & assault rifle, waste of food ratios.

And try to struggle until the end - suiting up the alien armor and going on a shooting spree alone is worth it! ;)

I agree with fergus, same old game w/o much new things so play only if you hacen't played prev. episodes.