Ok, on the level Answer The Phone, when you first have to fight the agent...jump behind him and keep smacking with your shotgun if you have one, if not, just keep punching him. Soon he'll fall off the edge. But unfortunatley, when you jump to the next building, he follows you. Another useful thing to do is use your focus and keep taping the Y button. You'll keep in an awkward way and he'll go flying of the edge. Hope this works for you!

I don't know about you but I had a real hard time finding the anchors in the lvl 'Waterways'
If any1 needs help, the anchors are the blocks that hold the big sirling pole in the ground
Just shot those a coupla times and it shuld come loose

After you equip your sword (see sword cheat), take it to the the castle and it will kill the vampires in one slice.