I can't remember how I did it, but all this talk is making me want to play it again. I freaking loved that game, especially with the 5.1 surround headphones I have. The noises are so awesome, and what the enemies say when you're near them is almost chilling. I never did get all the plasmids, and I believe there were some more in an update.
Yeah, I never got them all, but I got my fair share, same with those recording things... some of those were so ****ing creepy...
I got no clue if I found them all. I only played the game for a total of 2 days. I beat it though within those days.
I cant wait for the next Bioshock. Right after I finished it I always hoped there will be another. Thank God. This game was so amazing. They need to put an estimate year when it should be done.