Just started playing this. Didn't get on board when the game came out because fuck that DRM, so to be spoiler-free, I'm not digging up the old threads.
So, I know that the Little sisters have "Adam", but whet the hell does it do, and do I want to kill them for it?
ADAM is the lifeblood of Rapture. You want it. But you get some from them whether you kill them or "exorcise" them. Killing them just gets you a little more up front (and a little less down the road).
"I have not actually recommended many games, and I'll go on the record here saying my track record is probably best in the industry." - schild