Bioshock (360)
As I was leaving Neptune’s Bounty on the way to the submarine, I was told I hadn’t harvested or rescued all the Little Sisters in the area. I hadn’t actually seen any, so I had no idea where they were. I looked around a bit and found a couple more Big Daddies (who were pretty easy to kill with my grenade launcher thing) with Little Sisters in tow. Rescued them both, but forgot to “buy” anything with my Adam. Oh …