extra stage
if the player receives an aa or better grade (a score of 9,500,000 or higher, and thus 95% or more of the total dance points possible) on their final stage playing on expert or challenge difficulty, an extra stage is earned. any song may be chosen for the extra stage, although depending on the game mode chosen at the beginning of the game, an additional song which is not normally available is added to the song list. the extra stage may only be played on expert difficulty. the song modifiers are pre-set and may not be changed. finally, the extra stage’s life meter follows different rules; instead of starting half-full and (re)filling as the player hits steps accurately, the life meter starts completely filled, but cannot recover. approximately five "almost" and/or "boo" steps will deplete the meter and fail the song. if the starting game mode was easy or medium, the extra stage song is healing-d-vision by de-strad, a 10-foot difficulty song with a bpm of 180 which speeds up to 360 near the end. note that this song was originally rated a "9" before the patch released in mid-september. if the starting game mode was hard or all music, the extra stage song is fascination maxx by 100-200-400, a flashing-10-foot difficulty song with a bpm which shifts between 100, 200, and 400. the patch for ddr supernova, released in mid-september of 2006, also added another challenging song selectable only as an extra stage song. fascination ~eternal love mix~ by 2mb is a remix of fascination maxx that also has a shifting bpm, but it adds stops. the steps are simpler, but still difficult. regardless of song, the forced modifiers are 1.5x, rainbow, and reverse.
one more extra stage
the ‘one more extra stage’, also known as the encore extra stage, was introduced in ddrmax and is always a fixed song to play, with a set of predetermined modifiers. one more extra stage uses a "sudden death" life bar; the player automatically fails if they get any good, almost, boo, or ng steps. in supernova, it is obtained by passing healing-d-vision or getting at least an a grade on fascination maxx or fascination ~eternal love mix~ during the first extra stage. in supernova, the designated song for the one more extra stage is chaos by de-sire retunes, a mid-tempo to moderately fast song with an unusual rhythm and erratic stops in the beat — at least 43 of them — making it very difficult to follow. this song has the most difficult steps out of all. it is the first one more extra stage to have a foot rating of 10. the predetermined modifiers for chaos are actually none at all - the song must be played at the default settings all around.