While I think Bioshock 2 gets a lot of flak for being the lesser of the trilogy (and in terms of its narrative I can definitely see why), I believe that this one builds upon and diversifies all gameplay aspects of the original. For this reason I adore this title, the development of your character builds so steadily along the runtime and it all culminates in a gruelling final combat sequence where the game throws everything it has at you, while you have the power to throw everything you've built and learned right back at it.