One Piece: Gigant Battle
Unlock modes:
Complete the Thousand Arena (the 2nd option in the
main menu) in the following difficulties to unlock
new options.
Battle Royale Very Hard
Complete Battle Royale in hard difficulty with 5 characters.
Taiman Battle Very Hard
Complete Taiman Battle in hard difficulty with 5 characters.
Vs 100 Battle
Complete Battle Royale and Taiman Battle in very hard
difficulty with 5 characters.
Last Island:
Nightmare Island
To unlock Nightmare Island you must clear every level
(not mission) at least ones