The Need for Speed 2
(These passwords should be typed on the main menu)

Hollywood (allows access to the bonus track)
Pioneer (upgrades engines and handling)
Slip (allows easier sliding)

Bus
Semi
Bug
Vwfb
Vanagon
Miata
Bmw
Mercedes
Volvo
Armytruck
Snowtruck
Jeepyj
Landcruiser
Quattro
Commanche