When trying to enter a phonenumber so you don't have to find them if guessing whatever you do start everything with 555 or you won't have a single chance of unlock anything but you do know you could find them here on the internet.
When in the hills and trying to get the Darkness guns all you need to do is follow the path then fiddle about and wait till a wooden stick appears which has two dead bodies attached and walk over to them and then just follow the screen and your common sense.
When your in the Turkish baths or anywhere in New York remember to use all of the arms to successfully complete the acomplishments as a large amount of them are about the Demon arm. But remember also to use the execution move at least 50 times. This way it also keeps you alive.
Okay, when your in hell and your out of the trenches, your probaly at that screaming Bird/Man deal nailed to the cross deal. Don't waste your time with it. Just go on the trail to the right of it. You can hopely figure out the rest.
This is a little shortcut you can do to easily bypass most of the stuff you have to go through, Alright it's the mission where you need to use the radio at Grinder's Lane to call in the boat. Once you arrive at Grinder's lane take out all the bad guys in the area, Now your supposed to go through the meat locker to get on the other side of the locked gate. Instead of doing that use Demon Arm to pick up the car sitting next to the gate and raise it up over the gate so the front of the car is resting on the gate then let it go and the back end of the car should fall down, Now simply jump up on the back of the car and keep jumping to get all the way up over the car and jump over the locked gate.