Little Sister Savior Achievement
Little Sister Savior100
Complete the game without harvesting any Little Sisters.Try to save before you fight each Big Daddy in case you make a mistake. Once the Sister's Big Daddy is dead, you can either Harvest or Save them. To get this you have to save every sister on each level by pressing when prompted with the choice. To see how many sisters are on each level, hit the start button and look for how many icons are at the bottom of the screen.Note that this will not unlock until after the game is over.