Colosseum Mode
To unlock Colosseum Mode, all you have to do is beat the game once.
Ending Guide SPOILERS
There are a total of 8 endings for Catherine. Which ending you get depends on where your karma rating is by Stage 9, and your answers to questions asked during Stage 9. The question in 9-1 has no bearing on any of the endings so you can pick any answer.
BAD LOVER Requires karma to be in the red; Yes in 9-2, No in 9-3, and No in 9-4.
BAD CHEATER Requires karma to be in the blue; No in 9-2, Yes in 9-3, and No in 9-4.
NORMAL LOVER Requires karma to be in the blue; Yes in 9-2, No in 9-3, and No in 9-4.
NORMAL CHEATER Requires karma to be in the red; No in 9-2, Yes in 9-3, and No in 9-4.
TRUE LOVER Requires karma to be maxed in blue needle to be all the way to right; Yes in 9-2, No in 9-3, and Yes in 9-4.
TRUE CHEATER Requires karma to be maxed in red needle to be all the way to left; No in 9-2, Yes in 9-3, and Yes in 9-4.
NORMAL FREEDOM Requires karma to be in red or blue; No in 9-2, No in 9-3, and Yes in 9-4.
TRUE FREEDOM Requires neutral karma grey area; No in 9-2, No in 9-3, and Yes in 9-4.
Trick to full step combo
When playing on any difficulty other than Hard, you can trick the game into keeping your combo meter full. Whenever the meter is about to be completely drained, simply press Select to undo your last move which resets the meter to full.NOTE - This doesnt work on Hard difficulty because there is no Undo feature.
Unlock New Rapunzel stages
Input the following code at the title screen of the Rapunzel arcade game; Up, Down, Down, Up, Up, Up, Down, Down, Down, Down, and Right. When the code is entered right, you'll see some color changes. The code only works after you beat the first 64 Rapunzel stages.
Unlock Very Easy mode
Highlight the Golden Playhouse option when selecting a game mode, then hold Select/Back until you see a white flash. You need to do this every single time you start the game or load a saved file.