Select the Havoc or Battle Trak in versus or normal mode. If the CPU is about one or two dot moves behind, drop about two scatter mines at a turn on the track. The mines should split and the CPU will hit them. They will lift the car in the air and send it over a wall, causing it to crash. This must be timed correctly or it will just slow the CPU down or it will miss them completely.
Drive As Olaf
Highlight Tarquinn, then hold L + R + Select and press Right at the driver selection screen. Olaf from The Lost Vikings will now be unlocked as a driver in normal or versus mode.
Larry Sound Test
Enter the options screen and put the pointer on Larry. After enabling Larry, press L or R to hear different quotations from Larry.
Mode
Highlight NHO, then hold L + R + Select and press Right at the planet selection screen. The Inferno level will now be unlocked in versus mode.