Press Up, Down, Left, Right, A (To unlock all features in the game, enter the following when the game is loading the front end from finishing an event)
Kill Ai
Press Left, Left, A.
Infinite Nitros
Press Right, Left, A.
Jumps
Press Left, Right, A.
Bot Gang Up
Press Down, Up, A.
More damage
If you are doing anything offensive, use nitro and slam into enemies whenever possible for a boost in points immediately at the beginning. If a car is smoking and missing a door, hood, or something else, either nitro into it or hit your handbrake. Press the Analog-stick Left or Right, and slide into your enemy.
Kill computers
Press Left(2), A while the game is loading and you can read your "mission". The message "Kill computers" will appear in the bottom right corner to confirm correct code entry. Note: This may need to be repeated until the message appears.
Opponents only attack you
Press Down, Up, Right, B while the game is loading and you can read your "mission". The message "Bot Gang Up" will appear in the bottom right corner to confirm correct code entry. Alternately, press Down, Up, A.
No nitros
Press Right, Left(2), A while the game is loading and you can read your "mission".
Unlimited turbos
Press Right(2), A while the game is loading and you can read your "mission". A message will confirm correct code entry. Note: This may need to be repeated until the message appears.
Master code
Press Up, Down, Left, Right while the game is loading and you can read your "mission". A message will appear in the bottom right corner to confirm correct code entry. All secret options will be unlocked. Alternately, press Up, Down, Left, Right, A.