BioShock 2 once again raises the question of whether or not to rescue or harvest Little Sisters – the gatherers of valuable ADAM, the element that allows the residents of Rapture to "evolve", learning new abilities through the acquisition of Plasmids. A similarly neutered choice once more, as with the first title the rewards for either saving or harvesting every Little Sister are too close to offer a defining choice between personal gain and the aid of another, and most players will have decided their intentions in this regard before even meeting their first. However, the greater shade of moral ambiguity comes from three poignant characters the player will meet. Each of the three has wronged you, and each of their fates lies in your hands. What you do with it is a decision not to be taken lightly.