Archer Maclean's Mercury Cheats (PSP)

Select two player mode, then enter "hg?" as your initials. Return to the main menu and
start a single player game. At the world selection screen, hold L + R and press Select to
unlock all levels. To lock all levels, hold L + R and press Select again.

Place first on the high score boards for each stage. Each one has it's own bonus stage.

Get the top high score in each level in a world to unlock that world's bonus levels.

From the main menu, select 2-player mode. Enter the initials as hg? Quit back to the Main
Menu. Start a 1-player game. In the world hub, hold LEFT and RIGHT (shoulder buttons),
then press SELECT. This will unlock and allow access to all in-game levels. Holding
LEFT+RIGHT (shoulder buttons) and pressing SELECT will re-lock all levels regardless of
the 2-player initials.