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.

Mission skip
Intentionally fail a mission five times to have the option to skip the mission. Note: This cannot be done on the final mission.

Extra time
To get +2 seconds, hit the phone booths that have Mr. Burns' picture on them. You can get +2 seconds in the road rage levels by running over the Transit bus stops.

Extra time and money
Start in Evergreen Terrace. Drive straight ahead to the bus-stop and pick up the passenger. They will want to go to the Kwik-E-Mart. Drop them off and pick up the passenger just outside the Kwik-E-Mart. They will want to go to Smither's apartment. Drop them off and shoot down the alley opposite to pick up the passenger waiting at the end. They will want to go to Smither's appartment. The passenger will always be Martin, or the Sea Captain or Barney. Do a quick 180 and shoot down the alley to drop them off. Then, shoot up the alley again to pick up the next passenger, who will always want to go to Smither's apartment. Keep repeating this for easy money.

Nighttime:
Hold L + R and press A(4) at the options menu. A sound will confirm correct code entry.

Flat characters:
Hold L + R and press X(4) at the options menu. A sound will confirm correct code entry. All the people (except the character you selected) will be flat.

Show collision lines:
Hold L + R and press B(2), A(2) at the options menu. A sound will confirm correct code entry.

No map display:
Hold L + R and press Y, B(2), X at the options menu. A sound will confirm correct code entry.

Drive red brick car:
Hold L + R and press B(2), Y, X at the options menu. A sound will confirm correct code entry. Note: This car is controlled by Homer and is small fast, and heavy.

Drive as Smithers in Mr. Burn's limousine:
Hold L + R and press B(2), Y(2) at the options menu. A sound will confirm correct code entry.

Drive Nuclear Bus:
Hold L + R and press B(2), Y, A at the options menu. A sound will confirm correct code entry.

Special car moves:
Hold L1 + R1 and press A, B(2), A at the options menu. A sound will confirm correct code entry. Hold Gas + Brake + Handbrake while steering left or right while in mid-air to execute the Road Rage Roll. Hold Gas + Handbrake while stationary, then release Handbrake to execute the Speed Boost.

Time trial mode:
Hold L + R and press X, B, Y, A at the options menu. A sound will confirm correct code entry. There are no passengers, pedestrians, or traffic in this mode. Press Horn to start, stop, and reset the timer.

Slow motion:
Hold L + R and press A, X, B, Y at the options menu. A sound will confirm correct code entry.

Halloween mode:
Hold L + R and press B(2), X, A at the options menu. A sound will confirm correct code entry. Select any character to play as Bart in a Frankenstein costume. Alternately, set the system date to October 31.

New Year's Day mode:
Hold L + R and press B(2), X, Y at the options menu. A sound will confirm correct code entry. Select any character to play as Krusty in a tuxedo, Alternately, set the system date to January 1.

Thanksgiving mode:
Hold L + R and press B(2), X(2) at the options menu. A sound will confirm correct code entry. Select any character to play as Marge in a pilgrim dress. Alternately, set the system date to the third Thursday in November.

Christmas mode:
Hold L + R and press B(2), X, B at the options menu. A sound will confirm correct code entry. Select any character to play as Apu in a Santa costume. Alternately, set the system date to December 25.

Disable all active codes:
Hold L + R and press Start(4) at the options menu. A sound will confirm correct code entry.

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

Extra time:
To get +2 seconds, hit the bus stops booths that have Mr. Burns' picture on them.