it keeps crashing on loading into rapture the first time

I mean they're literally basically the same thing right?

title.

I know i'm a little late to the party but .. Oh my god i had no idea they removed the annoying 2k Launcher!! That's the only reason i ever uninstalled these games. God , i feel like im dreaming.

I don't understand what happened. This is my first playthrough. I rescued every little sister I came across (although I'm pretty sure I missed one or two) but I never harvested one In the final mission when you have to pretend to be a big daddy and escort one, she died, because the dumb idiot walked point-blank in front of a machine gun and went from full to 0 in like 2 seconds. Was that what caused it? Or did I accidentally harvest one and forget about it? I'm so confused...