Here are some cheats and tips for the game Q*Bert 3.
X*Bert mode:
Press B, Y(3), B, Y(3), Start
at the options screen. Start a new game to begin at the first
bonus level.
View credits and backgrounds:
Hold R + L at the options screen will appear.
The credit screen will be displayed. Press Select to view
different backgrounds.
Skip to level 11:
Press B(8) at the options screen. A sound will confirm
correct code entry. Press Start and return to the title
screen. Start a single player game to begin at level 11.