Pitfall: The Mayan Adventure Cheats...
All Weapons
Give Harry something extra up his sleeve. At the title screen, press A, B, Up, C, A, C, A.
Bonus lives and weapons
Press Left, A, Down, B, Up, Down, A, B, Up, C, A, C, A for extra lives, and full ammo.
Bonus mini-game
To play the Atari 2600 version of Pitfall, press Down, then "A" 26 times, then press Down again at the title screen.
Level select
At the title screen, press B, Right, A, Down, Right, Up, B, Left, A, Up, Right, A. If entered correctly, the level select screen will appear.
Nine Lives
Every cat has 9 lives, and with this trick, Harry will too. At the title screen, press Right, A, Down, B, Right, A, B, Up, Down.
Practice The Lever Game
Need a little leverage? At the title screen, press B, A, Down, C, Right, A, B.
Ultra speed
At the title screen, press B,A,Down, C, Right, Up, Down.
Unlimited continues
At the title screen press C , C, C, C, Left, A, Down, Up, Down for unlimited continues.
View Credits
At the title screen, press C, Right, Down, C, Right, Down, C, Right, Down.
All Weapons...