Re-Volt

All cars and tracks:
Enter B, A, Z, Z, B, L, A, C as a password. Alternatively, successfully complete any race in first place to unlock additional cars and tracks. The speed of the bonus cars and difficulty of the bonus tracks are determined by the difficulty of the track that was completed. Also, play the game in practice mode and locate the star in each level. Collect each star in all tracks (bronze, silver, gold and platinum) for each difficulty level to unlock the following cars: Ghengis Kar and Pole Pos (easy), R6 Turbo and NY 54 (medium), Mouse and Bertha Ballistics (hard), AMW and Toyeca (extreme).
Information in this section was contributed by Shahin.

Reversed tracks:
Break the times in time trial challenge mode on all normal tracks in all circuits.

Mirrored tracks:
Break the times in time trial challenge mode on all reversed tracks in all circuits.

Mirrored reversed tracks:
Break the times in time trial challenge mode on all mirrored tracks in all circuits.

Hint: Jump in multi-player mode:
Press C-Up to jump during multi-player mode.
Information in this section was contributed by Kadabra693.

Hint: Getting unstuck:
Press C-Up to get unstuck. For example, if you fall into the pool in Toytanic, press C-Up to stop and get out of the water. Press R when flipped over to get right side up.
Information in this section was contributed by Kadabra693.

Glitch: Toy World 2:
When you finish Toy World 2, try and get your car on the rails of the train track. If done correctly, the train will eventually appear and take you into a blue area and leave you there.
Information in this section was contributed by jim baker.