In that case, no. The only way you can do that
Spoiler:
is going to an earlier save point before you faught him. What I did because I knew the boss battle was coming up, I saved before I entered the room. So now I can go back and get everything as a big daddy. Pretty sweet. Enemies don't aggro you when you're a big daddy
What happens if you miss a Little Sister? Is it that big a deal? I just did the part where you save the forest or whatever, and I was about to go to Fort Frolic when it said "You have not rescued or harvested a Little Sister in this level. You need the Adam. It will be VERY DIFFICULT to surivive in the next level without the Adam."
So I went back and followed like 4 different Big Daddies they each banged on 3 different things where the sisters are, and not once did a sister come out. And I checked in the start Menu, where it says how many sisters are in the level, and it has both Icons that I've got them, unless that means I've just killed the Big Daddy that was protecting then, and not the Sister herself.
I have no complaints about the length of the game, it was more of an observation.
I dont know how to use those spoiler tags but people who've beating the game already knows what I'm talking about.
It's one of those rare FPS games on where its 20 hours and it doesnt get boring. Remember Doom 3? The game was alot of fun, but it was boring as hell the half way mark because it was the same thing over and over and was just added to bring length to it.
I love long games, but I rather have an intense game that lasts 10-12 hours than an game thats fun but gets boring. Length doesnt equal being good.
Bioshock though is an expection.
