Challenges and Curly Story
The features that are unlocked with the 'Best' ending will stay unlocked but you will need a save file that has the Nemesis/Curly's Panties to keep the Nemesis Challenge/Curly Story unlocked.
Boss Attack Mode:
Earn the 'Best' ending.
Curly Story:
Have Curly's Panties
Sanctuary Time Attack Mode:
Earn the 'Best' ending.
Wind Fortress Stage:
Earn the 'Best' ending.
Nemesis Challenge Stage:
Obtain the Nemesis and save the game.
More tricks, tips and cheats for this game are right here - Cave Story 3D cheats
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