Completion bonuses:
Successfully complete the game under the easy or normal difficulty
settings to view the first ending and unlock the "Mission Mode",
"Gallery", "Ghost List" options and the "Feel" and "Expand" camera
abilities. Additionally, a new game can be started with the current
items, maps, and camera abilities.

Hint
Successfully complete the game under the normal difficulty setting
to also unlock the "Hard Mode" options, two alternate costumes
(red/blue kimono and dark blue kimono), and glasses for Mio.

Hint
Successfully complete the game under the hard difficulty setting to
view the alternate ending and unlock the "Nightmare Mode" and
"Album" options, the true ending sequence, and two more alternate
costumes (short kimono and Yae and Sae kimono).

Hint
Successfully complete the game under the nightmare difficulty
setting to view the alternate ending and to unlock two more
alternate costumes (leather).

Successfully complete all missions in mission mode to unlock the
maid costume and glasses for Mayu.

Hint
Successfully complete all missions in mission mode with an "S" rank
to unlock two additional costumes.

Hint
Successfully complete the Ghost List to unlock set-up information