Type this in the Game Status screen:

MONSTER WHEELS

Now you'll get really big tires, this doesn't only look cool, but you'll also get extra stability whit such tires

Type this in the Game Status screen:

WMNNQLHTSCUCLH

Now you'll get:
- 2 hidden circuits
- 5 extra characters, including an ALIEN with a really cool flying soucer in which you can fly over all your enemys, but you can also kill them with your deadly laser

Type this in the Game Status screen:

SEE ALL MOVIES
Now you'll see all animations with new characters, without completing all the levels!

Hints

Not all vehicles have fast acceleration, but you can shift down a gear for faster takeoff by double-tapping the Gas button at lower speeds.
At higher speeds, use the Hand-Brake button when turning to perform a quick 180 degree spin!
If you carry some missiles, you can use the Afterburner secret move for the ultimate boost, to enhance your jumps, or to get out of tight spots.

If your engine stalls, press the Gas button repeatedly until it starts up again. It’s a matter of timing.

Stuck upside-down? Tap the D-Pad repeatedly left or right to roll the vehicle back onto its wheels!

Weapons:
In addition to your machine gun, you can carry up to three weapons at a time. If you pick up more, your currently selected weapon will be discarded, so… plan ahead! Discarded standard weapons can be collected again… but you better be quick, before they disintegrate.

Your weapons systems are prone to overheating, so their firing rates have been set for optimal performance at the factory. If you attempt to fire faster than allowed, you will hear a buzzer and the weapon won’t fire. Likewise, if you keep firing your machine gun continuously, it will slow down to a crawl. So, learn the timing or give it a breather!

Targeting:
By default, your radar is set to auto-targeting mode-it will attempt to target the enemy directly ahead of you, regardless of its distance.

You can override the selected target at any time by pressing the Select Target button, switching to the enemy closest to you. Pressing the button repeatedly allows you to cycle through all enemies. Once the override is engaged, it will remain locked onto its new target. When a new weapon is selected, or the selected enemy is destroyed, the radar will revert to auto-targeting mode.

Strategy
While smaller vehicles are weaker, they are more difficult for the enemy to target. If you select a small car, just make sure to keep on moving. Also, do not try to ram vehicles larger than yours-stay out of their way!

If you manage to hit your opponent with two (or more) different weapons simultaneously-it’s a “WHAMMY”- you do more damage that way!

By carefully choosing your attacks, you can bring your opponent to a 'wrecked' state at near-zero health, stalling the vehicle for a few seconds before it explodes. This is your chance to “TOTAL” it with a secret move or a special weapon