Minerva's Den is the final piece of BioShock 2 DLC you'll ever get. Taking place in parallel to the main story of the game, this $9.99/800 MS Point add-on puts players in the huge, metallic boots of Subject Sigma, another Alpha-series Big Daddy who just isn't having a great day in the underwater metropolis of Rapture. Instead of dealing with Sophia Lamb, Sigma has his own nemesis to contend with: Reed Wahl.

You see, Reed Wahl holds the keys to the kingdom of Minerva's Den, which itself houses one of Rapture's greatest assets: The Thinker. It's a gigantic super computer unlike any other controlling the Rapture Central Computing district. Aiding Sigma is a character you may have forgotten about, because she kinda just disappeared at the beginning of the game: Brigid Tennenbaum.