A Bioshock 2 physical copy retail key which can be activated on Steam, I believe doing so will also get you the Minerva's Den DLC for free (not entirely sure about this one, but it did work a few months ago)
Owning Bioshock 2 before September 18th (when the Bioshock Collection is released) will also get you the remastered version of Bioshock 2 for free.
A Bioshock 2 physical copy retail key which can be activated on Steam, I believe doing so will also get you the Minerva's Den DLC for free (not entirely sure about this one, but it did work a few months ago)
Owning Bioshock 2 before September 18th (when the Bioshock Collection is released) will also get you the remastered version of Bioshock 2 for free.
Not taking any other offers.
Add me for a quick trade. :)