Start a new game. Enter your name as "RVLL" the second "L" should be flashing, then press "A" . The name will automatically earase. Now press "B" to go back.
You will see on the main menu "ALL MISSIONS" then go to it and press "A". Now start a game with your real name.
You will now have all missions. When you start a mission pause the game. You will see a new mode (CHEATS) press "A" And you will see all the codes you can activate.
To activate a code press "A".
More tricks, tips and cheats for this game are right here - Hidden and Dangerous cheats
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