Press L,L,X,Y,Y,R,R, at the main menu

X,X,Y,Y,L,R,L

X,X,Y,Y,R,R,L

X,Y,L,R,L,R,R

L,L,X,Y,Y,R,R

You can lower and raise the drawbridge at dodge island

To get all weapons go to the options then extras then enter: L, L, X, Y, Y, R, R.

R = right thumbstick
L = left trigger

Invicibility:
X,Y,L,R,L,R,R

Then a bell noise will sound to confirm the cheat code
then select options then cheats an toggle the cheat(s) on or off

All Vehicles:

X,X,Y,Y,L,R,L

do the same as above

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Editor's note: I wasn't going to add these as I'm not sure if they work, so I thought I would let you guys give them a try seeing as the game is now out... If you try them please come back and either verify or bogus alert this submission please!
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On the main menu select options, then extras.
type in:

L,L,X,YY,R,R
X,X,Y,Y,R,R,L
X,X,Y,Y,L,R,L
X,Y,L,R,L,R,R

Each line gives a different cheat but i type them all in at once so I do not know what each one is on its own.