First off, let me say to the people below, this area is for posting reviews, not walkthroughs. If someone wants to see a walkthrough, they look it up on google.
As for this game, I think it's such a pity - there are so many good things about it - storyline, atmosphere, puzzles, but the shooting scenes are scaled far too difficult. Looking at reviews for a few years ago I see some people saying those scenes are too easy, but I can only think that the game has been patched since then, or some update to flash has caused a change in behaviour. I'm not claiming to be the best gamer, but I have been playing games for the past 25 years, and I couldn't get past the final shooting sequence. It seems to be random where the creatures appear from, and you can simultaneously get attacked from opposite ends so there's no way you can defend against all of them. Also because of the flashlight you're not even going to see when that happens. You've effectively got to keep playing until you're lucky enough that that doesn't happen too many times, which would be fine, if it were fun. They are repetitive, and of poor quality.
The puzzles were slightly better than in the first game, and not continuing with the body temperature guage was welcome (although it was fun the one time), although if that was to put the shooting element in instead then that was a terrible mistake. I really don't get why someone would put 3rd rate shooting elements into point and click flash games - it is clearly not their strongpoint, but if you do include them then those elements of the games have to be compared to other shooters on newsgrounds for quality purposes - and I'm afraid this comes up way short.
If the shooting parts of this game were simply removed, I think this would be a comparably good point and click adventure game, but adding a substandard (and mostly unwelcome) element spoils the game.