At the conclusion of the Epilogue scene at the end of the game, you'll be given an opportunity to save an "All Clear" game into any save slot you choose. Load the "All Clear" game save at the main menu to start a new game where you get to keep all costumes, device encyclopedia entries, and memory encyclopedia entries you've unlocked so far (you do not get to keep your character encyclopedia entries).
Unlock "Lord of Terror" bonus scene
Acquire two items each in Chaos Zone stages I and II.
Unlock Belldandy's bonus scene
Collect two items each in Present zone stages I, II, and III.
Unlock Belldandy's goddess uniform
Clear Present zone stage IV.
Unlock Belldandy's swimsuit costume
Collect all hearts in the present zone levels.
Unlock Skuld's bonus scene
Collect two items each in Future zone stages I, II, and III.
Unlock Skuld's goddess uniform
Clear Future zone stage IV.
Unlock Skuld's swimsuit costume
Collect all hearts in the future zone levels.
Unlock Urd's bonus scene
Collect two items each in Past zone stages I, II, and III.
