Beat the game and save when asked. Select "Game settings" on the options
menu, and enable the cheats. Load or start a new game to begin with 999
ammo, all weapons, and all combos.
After unlocking cheat mode, turn it on. Start a game and press X, X, X,
Square, Square, Square instead of using medkits and your energy and turbo
bars will refill.
The Shocker Triangle, Triangle, Triangle, Circle, X
Grand Slam Circle, Ccircle, Circle, X, Square
Spinal Crush Triangle, Circle, X, X, Triangle, Triangle, Circle, Circle
GOTCHA! Triangle, Ccircle, Circle, X, X, Circle, Square
When you start the game instead of going left, go right. There is a garbage
bin, go up to the garbage bin and try to pull it by pressing Down + X or
Triangle or anyone of the buttons for that matter. Once you get it out of
the way go inside and there is a free life and if you go straight you can
push the wall and you're at the door.
Thanks to Revolution readers Talosyn and Will!