Pac-Land

Cheat mode:
Hold I + II and press Run, Run at the title screen to display the options menu. Release the buttons, then press Run to access the sound test menu. Press Run again to display the title screen. Press Run to display the level selection option in the format "Skip 1". Use I or II to select a starting level, then press Run to begin game play.

Hidden scene:
In the Japanese version, hold I + II and press Run at the title screen to see a hidden Pac-Man scene. Hold I + II and press Run again at this screen to display the cheat mode menu.

Expert mode:
Enable the "Cheat mode" code. Press Up ten times at the level selection option. Alternately, press Start during the ending sequence.

Invincibility:
Enable the "Cheat mode" code. Press Down one hundred times at the level selection option.

Hatless Pac-Man:
Reset the game at the end of round when Pac-Man's hat jumps into the air next to the "Break Time" sign. The hat will remain in the air during the next game.

Hint: Final level:
Move near the surface of the lake to avoid all ghosts.