These are my game save files from Bioshock 2.  I figured someone out 
there maybe lost their game saves and may not want to start from 
scratch.  I save pretty frequently -- not all the saves will fit in the 
directory.  I typically save immediately before a larger battle or event 
and immediately after.
I played the game through on Medium difficulty.  I rescued all the 
little sisters, and forgave the NCPs  with the exception of the big guy 
-- the third one, as his sane self had requested to be  set free from 
this mindless nature  .
Basically, just throw these guys in your Bioshock 2/SaveGames folder 
which should be located in your My Documents folder.  I believe 30 is 
the limit the game allows, so choose the ones you use wisely   I 
typically got to 10 saves and then archived the saves from that 
directory so that I could have more.  : 
- Jay Baldwin
www.jaybaldwin.com