My 11 year old just finished and he wanted me to tell the Alien guys I argue with that he thinks it's the best game he's ever played, it's his current favorite game, and that he wasn't as scared as his dad, but he was still scared.. He's not a big fan of the shotgun not slowing the Alien down and that the alien was pretty smart, but was too loud.
I find it funny my son was weaned on CoD didn't cry about difficulty like IGN. He did kind of ragequit a few times.