Enter "CIRCUS" as a code at the "Secret Unlocks" screen.

Enter "BITESIZE" as a code at the "Secret Unlocks" screen.

Successfully complete the Deep Descent level to unlock the Vanquish Submarine card and
Nick Nack in multi-player mode.

Put in the code Q LAB  (Must have
  the space)

Enter "ZERO G" as a code at the "Secret Unlocks" screen. Note: There is a
space in the code.

  
On the Enemies Vanquished level during racing
  pause the game and HOLD L and press Right, Right, Left, Left, Up

Successfully complete the Equinox level to unlock the James Bond card, GoldenEye Strike
multi-player mode, Sniper Rifle upgrade, and Bond Space Suit in multi-player mode.

Put in the code AQUA

Enter "SLEEPY" as a code at the "Secret Unlocks" screen. Your tranquilizer darts
will be upgraded so that enemies will stay down longer.

Put in the code TEAMWORK

Enter "BONSAI" as a code at the "Secret Unlocks" screen.

On any level during racing pause the game and
  HOLD L and press B, Y, X, B, B

Enter "SESAME" as a code at the "Secret Unlocks" screen.

Put in the code TRACTION

Put in the code MELTDOWN

While racing on any level, pause the game, then hold L and press B, Y, X, B(3), then
release L.

On any level during racing pause the game and
  HOLD L and press X, Y, B, Y, X

Enter "VOODOO" as a code at the "Secret Unlocks" screen.

Enter "HIGHRISE" as a code at the "Secret Unlocks" screen.

Put in the code POWDER