Katamari Damacy mini-game:
To unlock the Katamari Damacy mini-game, beat 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.
Katamari Damacy mini-game Evening level:
To unlock the Evening level, beat the Katamari Damacy mini-game.
Katamari Damacy mini-game Night level:
To unlock the Night level, reach the Castle in the Evening level of the Katamari Damacy mini-game.
Eternal mode:
To unlock the Eternal version of a stage, get over 80 points as your second score at the end of a normal mode stage. In Eternal mode, the time limit is removed.
Alternate name board:
To have the island’s name board will appear on a strobe light name board instead of wood, get a 100% object collection by finding all 2,434 objects.
Sound Test tracks:
Beat the game and watch the credits to unlock the ‘Blue Orb’ and ‘Song For King Of Kings’ songs at “Vacation Memorial”