Bioshock (Xbox 360)

Easy way of killing Big Daddy's:
Use 2-3 of the crossbow trap ammo on a big daddy, first line up 3 traps spaced apart in a line going across a room and then shoot the big daddy from a distance so he runs towards you. Stand where he will come for you, but go through the traps instead he will die after he hits them.
(supplied by: hitoshi-raikoh)