Bonus Track, Neon Bike and Roach Bike
Finish 1st on every track using Extreme difficulty. You can also use 81GGD5 as a password

Slippery Track
Enter "banana" at the name entry screen (Contest Mode). The track will now be super-slippery and make racing a lot harder.

Unlimited Turbo Boosts
So Extreme-G is still not fast enough for you? Enter the word "nitroid" at the name selection screen and you get unlimited turbo boosts.

Extreme Speed
For the ultimate challenge, try the "Extreme Mode." Simply enter "xtreme" as your name at the name selection screen (Contest Mode) and XG cranks up the speed even more. Combine with Fisheye for some insane action.

Extremely Ghostly
Enter the word "ghostly" at the name entry screen (Contest Mode) and all the track polygons will be transparent. You can now see right through walls and even the very ground you race on.

Weapon Pick Ups
Enter ARSENAL at the vehicle select screen

Magnify Mode
Enter the word "magnify" (all lower keys) at the name entry screen and your view will be strangely distorted (magnified). Your bike is now at the very bottom and everything will seem huge.

Race Upside Down
Enter the word "antigrav" at the name entry screen (Contest Mode) and you will finally be able to race upside down without standing on your head...

Stealth Mode
Enter "stealth" (all lower keys) at the name select screen (Contest Mode) and you will hear a confirmation sound. Now start a race and all drivers should be invisible, but you can still see their shadows and weapons.

The Ultimate Bike: Neon
Finish the final circuit and you get Neon, the best bike in the game. All attributes are completely maxed out, including speed, shields and handling.

Ugly Mode
Enter "uglymode" at the name selection screen (Contest) and you can see what Extreme-G would look like without mip-mapping and texture transparencies. Very PSX-ely.

Wireframe Mode
Want to know what a Color Virtual Boy version of Extreme-G would look like? Start a new Contest and enter your name as "wired" (all lower keys). This will eliminate all textures and only give you wireframes.

Ride the Roach
Finish Extreme-G's Contest Mode on Meltdown, and you receive Roach, an extremely well-performing racing machine. Use it to exterminate your enemies.

Fisheye Lens
If Extreme-G is still not fast enough for you, how about an optical trick that makes the scenery fly by even faster? Go to the "Contest" mode, enter your name (press R, then press R to switch to lower case in the name entry menu) and enter the word "fisheye" (all lower case). You will hear a confirmation code to tell you that the trick worked. The screen will be distorted (like with a fisheye lens) and gives you an even greater feeling of speed

Race as a Boulder
Extreme-G lets you transform your bike (and everyone else's) into a rolling boulder. Start a new "Contest" and at the bike selection press R. This brings up the name entry mode. Press R again to switch to lower case. Just enter the word "roller" (no caps) and you should hear a confirmation sound. Start the race and get ready for a different kind of "Boulder Dash."