Re-Volt (N64)

Unlocks everything:
Go to password section and enter B, A, Z, Z, B, L, A, C.

Extra Cars & Tracks:
To get extra cars & tracks, beat a championship race (bronze, silver, gold,
or platinum, it doesen't matter) finishing first in points standing. In bronze
you unlock slower cars but in platinum you will unlock faster cars. With
tracks you unlock harder tracks in gold and platinum, but in bronze and
silver you unlock easier tracks.

Mirror Tracks:
To unlock mirror courses, beat Time Trial Challenge times on all reverse
tracks in each circuit.

Reverse Tracks:
To unlock reverse courses, beat Time Trial Challenge times on all
(forward) tracks in each circuit.

Reverse-Mirror Tracks:
To unlock reverse-mirror courses, beat Time Trial Challenge times on all
mirror tracks in each circuit.

Jump in Multiplayer:
Just press C-Up during a multiplayer game

Movement Hints:
C-Up will get you unstuck, out of water, etc.
R will flip you right side up when flipped over

All cars and tracks:
At the title screen, press B, A, Z, Z, B, L, A, C-Up