New Year's Day mode:
Set the system date to January 1 to unlock Krusty in a tuxedo.

Thanksgiving mode:
Set the system date to the third Thursday in November to unlock Marge in a pilgrim dress.

Christmas mode:
Set the system date to December 25 to unlock Apu in a Santa costume.

Halloween mode:
Set the system date to October 31 to unlock Bart in a Frankenstein costume.

Car built for Homer:
Complete all ten levels in mission mode to unlock the car built for Homer.

Hidden car

Successfully complete all ten missions in mission mode to unlock The Homer car. The car is selectable in any mode by choosing Homer's picture at the car select screen.



Hidden New Year's character

Set the system date to January 1 to unlock New Year's Krusty under the "?" at the character selection screen.



Hidden Halloween character

Set the system date to October 31 to unlock Halloween Bart (dressed in a Frankenstein costume) under the "?" at the character selection screen.



Hidden Thanksgiving character

Set the system date to November 22, 2001 to unlock Thanksgiving Marge (dressed in a Pilgrim costume) under the "?" at the character selection screen.



Hidden Christmas character

Set the system date to December 25 to unlock Christmas Apu (dressed in a Santa costume) under the "?" at the character selection screen.