For the following cheats you must press the four keys all together:
God mode - [Z], [E], [U], [S]Warp mode - [N], [E], [X], [T]
Increase ammo - [X], [T], [R], [A]
NOTE: For 'Warp mode' and 'Increase ammo' you must release the third key
of the four-key combination before you release the other keys.
EXAMPLE (Warp mode): First, press and hold: [N], [E], [X], [T]
Next release: [X] Then, release the other three keys.