View song list:
Hold Left + Right + Start at the song selection menu. Choose one of the category letters to view songs that begin with that letter.
Extra options:
Hold Start after choosing a song at the selection screen. Alternately, choose a song at the selection screen, then hold Circle.
Boost mode:
Press Left, Right, Down, Up at the song selection screen.
Groove radar values:
Select a difficulty setting, then hold Start just before the song selection screen appears. If timed correctly, numbers will appear on the groove radar, indicating the groove value of each song.
MAX 300:
Finish the final song in heavy mode with an "AA" rank to unlock the MAX 300 extra stage. Complete the extra stage (MAX 300 in heavy mode, at fast speed, and reverse arrows) to unlock MAX 300 in arcade mode. Alternately, clear 100 songs in heavy mode.
Candy:
Complete the MAX 300 extra stage with at least an "AA" rank to unlock the Candy extra stage. Complete this extra stage to unlock Candy. Alternately, clear 200 songs in heavy mode.
So In love song:
Clear 20 stages in arcade mode.
Kind Lady song:
Clear 40 stages in arcade mode.
True (Trance Sunrise Mix) song:
Complete the Firefly (Be For U), Dive (More deep and deeper style- Be For U), or True (Radio edit - Kosaka Riyu) songs. Once two of those songs are completed, the True (Trance Sunrise Mix) song will be unlocked.
