Hyper Spray - After finishing the game once, play again and get the rebirth (R) ending.
These are the secret weapons and items: Chainsaw - Simply finish the game to be able to find this secret weapon at some logs on the forest trail, in the early parts of the game. Finish the game to earn even more options here, including the screen filter and the ammo multiplier.
Press L1 or R1 at the option screen to go to an extra option screen. Here are the solutions to the puzzle, from left to right, based on the difficulty level you're playing on. In the Blue Creek Apartment, you will find a puzzle consisting of a safe with five holes in it.
