Activate the following cheats by entering the corresponding sequences of buttons after pressing pause during game play:

CHEAT FUNCTION - CHEAT CODE
Telephone - RIGHT, LEFT, RIGHT, LEFT, DOWN, DOWN, UP, UP, CIRCLE, SQUARE, CIRCLE, CIRCLE, SQUARE, SQUARE.
Chainsaw - UP, DOWN, UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, CIRCLE, SQUARE, CIRCLE, SQUARE.
Unlockable Secret Sword - UP, DOWN, UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, CIRCLE, SQUARE, CIRCLE, SQUARE.