Sega Genesis Collection cheats and cheat codes for Sony PSP

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Altered Beast Codes:

Hidden Options Menu:
Hold X and press the Start button at title screen

Continue Game on last stage:
Hold Square and press the Start button repeatively after death

Stage Select:
Enable Options Menu. Choose a stage, hold square and press the Start button

Choose Beats for each stage:
Hold Square, X, Circle, Down/Left and Start at the Title Screen

Sound Test:
Hold Square, Circle, Up/Right and Start at the Title Screen