Unlock all cars:
Enter RETROF1 as a name.

Unlock Jordan 191 car:
Win a season in arcade mode.

Unlock Lotus 72E car:
Win a season in simulation mode.

Unlock Renault RE20 car:
Win the championship in career mode.

Unlock Williams FW14B car:
Win a race in arcade mode.

Alternate introduction sequence:
Get an entry in the top ten lap times in time attack mode.

Control car preview:
When previewing a car, use the Analog-sticks to turn the wheels.