As many above have said, Bioshock 2 is great and I loved it. The weapons and plasmid system is way better. An example: instead of a little revolver you have a rivet gun like the rosies from bioshock 1, instead of a tommy gun you have a huge gattling gun, instead of a crossbow you have a spear gun that shoots huge, unbreakable steel spears that can pin splicers to walls! As for plasmids, in bioshock 1 whenever you upgraded plasmids it was just the same plasmid with a bit more kick. In Bioshock 2 you can do a little more specialization with plasmids (and weapons). Almost every plasmid has 2 evolved forms that you can pick and choose from depending on which ones you like more. Like winter blast 2 allows you to freeze enemies in a solid ice block with a charged blast and it's awesome.