An incredible difficult to kill monster in Bioshock. The worst part is that you don't necessarily have to kill it, but if you don't you wont get the "little sister" (maybe that's why they call it bigdaddy) and without what she gives you it's very difficult to finish the game, so you have to go through the nigthmare of killing one everytime you see that piece of shit walking around, and if you are a begginer i guarantee you'll die at least 3 times before killing one but tha's the fun of the game zD.
noob*playing*bioshock: mmmh i hear some heavy steps.
noob*playing*bioshock: so thats the monster i heard of it doesn't look so difficult to kill i'll attack it.
( 5 seconds later )
noob*playing *bioshock: what?!!! i'm already dead but i didn't do anything to it damn!!!