[user104658]

So for anyone who has yet to replay... DON'T skip back chapters on your next play through without finishing! Learned this the hard way. I was going for saving everyone, saved everyone right up until chapter 8 (had previously gone back to chapter 4 to save Jess and later Chris, successfully), then accidentally got Emily killed and thought "Oh it's OK I'll just restart this chapter". NOPE. Reverted my game back to my first playthrough and Jess and Chris were still dead. Utterly lame. Although funnily enough, when I played from there until the end, Mike survived and Sam died whereas in my first play it was the other way around.

Meh. At least I got to see a couple of extra death scenes. Next playthrough we're killing everyone ... impossible to mess that up. Bad decisions here we come!