High Gravity...
	Low Gravity...
	Player Skulls (Arcade Only)...
	Savant difficulty mode...

On the main menu, press Down, Down, Down, Down, Right, Left, Right, Left.

On the main menu press Up, Up, Left, Left, Up, Up, Right, Right.

On the difficulty menu, press Up, Right, Down, Left, Up, Right, Down, Left.

On 1 player mode in Arcade on the difficulty selection screen press down ten times and the cursor will move automatically under the Master difficulty and the game will automatically start in Savant mode.