Turbo Mode- To get the Turbo Mode, at the "Press Start" screen press B, B, R, Up, Left, Down, C-Up, C-left.
Gore Mode- To get the Gore Mode, at the "Press Start" screen press Z, Down, C-Up, C-Left, C-Left, C-Left, C-Left, C-Down.
Psychedelic Mode- To get the Psychedelic Mode, at the "Press Start" screen press A, R, Left, Right, Down, C-Up, C-Left, C-Down.
Wire Frame Mode- To get the Wire Frame Mode, at the "Press Start" screen press L, L, R, Z, Left, Right, C-Up, C-Right.
Extra Characters-There are 8 total extra characters to get in the game, for a total of 16. The extra characters are Septre, Ex-Cop, Jo, Nubia, Cerbero, Mephistofun, Hk-5, and Dr. Nepenthe (Nutta). All the extra characters are located somewhere within the levels of the single player game. If you find one of them kill him and you will be able to select them on the Biker select screen. In Battle Mode sometimes you can get them if you use CPU opponents and one of opponents is one of the extra characters.
Bypass the Advertisments- To skip the advertisments turn the power on and then reset the game. Now you can press start to skip all the ads.