Minerva's Den DLC for Bioshock 2.
A pretty nice add-on to Bioshock 2 for people who want more of the same. There are a couple of new weapons and plasmids, and the enemies are the same with a couple of new elemental variations - Fiery Brute Splicers and Frozen Houdini Splicers. Add in a puppet protagonist and a megalomaniac villain and it all sounds very familiar.
Still, it is nicely done, and it was a pleasure to tramp around the new areas. I guess that's the end of Rapture now.