An excellent addition to Bioshock 2 that almost feels like a whole new game in and of itself.
Minerva's Den is a short story that takes place during the fall of Rapture over the course of 3 levels. While it isn't expanded out to the extent of the two Bioshock games themselves, it actually ends up being roughly half as long as the 2nd, which makes the $10 price tag more than worth it. What makes this game stand out, however, is that it possess a great story that I think is actually superior to that of Bioshock 2's. I won't go into it too much other than that it is totally separate from the other two stories, and the only returning character is Dr. Tenenbaum. She plays a small role, but nonetheless you'll grow to care about the other characters here as well.
There are a couple new weapons that are actually very useful. One is a plasmid that pulls everything to it and then shoots everything out with great force. I really enjoyed using it. Also there is a new gun that shoots a laser beam, a charged laser, and an incendiary laser. This was also quite useful. Otherwise nothing should be too different from the regular Bioshock 2 experience here. This is just a great add-on, and anyone longing for another adventure in Rapture should purchase this, as it is well worth it.
Pros:
-New weapon, plasmids
-Great story, characters
-Decent price for what you get
-Easy trophies for trophy hunters
-Lasts about as long as other shooter campaigns out there
Cons:
-Wish it were longer
-Not sure about this, but it seems that how you deal with the Little Sisters doesn't seem to impact the game too much
-Design and scripted events are a little predictable after playing Bioshock 2
Would love to see more of these types of add-ons. Maybe one where you don't have to be a Big Daddy and handle weapons/plasmids like you do on multiplayer. Make more of these, 2K!