Bioshock - Pictures

You will find that sometime during the second level, you receive a camera. Take pictures of the "Splicers" at every avaliable oppurtunity, even if they are dead. This is because over time if you take photos of a specific type of "Splicer" you gain an advantage over that "Splicer", for example, you may do more damage against them. Furthermore you gain achievements in the Xbox 360 Version of the game for taking a certain amount of pictures.