Katamari Damacy Minigame
Successfully complete the game. After the King speaks during the ending sequence, a short level based on the original Katamari Damacy in classic 8-bit style will begin. You can control the mini-game during the credits by using the D-pad to move and Circle to jump.
Soundtrack Unlockables
Clearing the various missions will unlock new songs in the game's Sound Test (found in the Vacation Memorial). You will also be able to select the songs for play during any mission you choose.
Upgrade Island's Name Board
By collecting 100% of the 2,434 objects in the game, your island's name board changes from wood to a strobe light name board which has many colors.
2d Evening Mode
Beat 2d Daytime Mode (During Credits)
Eternal Mode
Eternal Mode (play without a time limit) is unlockable for all 16 normal stages. To earn a given stage's Eternal mode, score at least an 80 as your second score at the end of the stage. To access Eternal once you've earned it, talk to the animal, make your selection, and choose the top choice when given a choice. To exit the Eternal stage and save all items/cousins/presents collected, pause and press Square, and choose the left choice.