Custom corvette mode
Win all C3 career mode races.
Route 66 Challenge
Win all C5 career mode races.
Hints
Get cops off your tail
When a cop starts to chase you, try to speed as much as possible or take a shortcut. With the 1978 Corvette 25th Anniversary, the cops will catch up with you -- try your best to get away from. Note: this will only work when you race one on one.