To toggle on a chain counter which appears beneath the Chain Status box, press Z at anytime during gameplay.
Unlock Gallery 1
To unlock Gallery 1, beat Trial Mode without continuing. Or, play the game for more than five hours total.
Unlock Gallery 2
To unlock Gallery 2, beat the game on any difficulty. Or, play the game for more than ten hours total.
Unlock Game Mode Option
To unlock the Game Mode option, beat the game on Normal without continuing. Or, play the game for more than twenty hours total. The option can be found in the Appendix menu.
Unlock Sound Test
To unlock Sound Test, beat the game on Easy without continuing. Or, play the game for more than fifteen hours total. Sound Test will be available in the Appendix menu.
