For the unlockables below, you have to get the specified score or higher to get the unlockable:

Effect - Code

Alternate Costume - Ash - 1,000,000
Alternate Costume - Kameo - 500,000
Alternate Costume - Major Ruin - 2,000,000
Boss Fights - 2,500,000
Cheat Set #3 - 3,000,000
Cutscene Videos - 1,500,000