I have to agree that Bioshock was a watered down version of System Shock 2. SS2 was so much more open ended and by the end you weren't so grossly over-powered that you didn't really have the motivation to keep going because it wasn't that easy. If there were ever a mod that redid the graphics for SS2 so that it played out a bit more rounded instead of blocky, I might just think I had found myself to be in heaven.