Compact series Unlockables in Burnout Legends:
Note: the Compact collector car varies from each disk.

Compact cop - Awarded for bronze in silver lake or airport T1 & T2 pursuit
Legend compact - Awarded for gold in interstate loop legend face-off
Gangster legend - Awarded for gold in palma bay legend face-off
Dominator compact - Awarded at 10.000 burnout points
Tuned compact - Awarded for 5 gold medals
Assassin compact - Awarded at 15 takedowns
Random compact collector - Awarded for gold in silver lake eliminator

Muscle series Unlockables in Burnout Legends:
Note: the Muscle collector car varies from each disk.

Muscle cop - Awarded for bronze in harbour town or sunrise valley pursuit
Classic legend - Awarded for gold in big sure shore legend face-off
Ledgend j-muscle - Awarded for gold in airport 1+2 legend face-off
Dominator muscle - Awarded at 25.000 burnout points
Tuned muscle - Awarded for 20 gold medals
Assassin muscle - Awarded at 30 takedowns
Random Muscle collector - Awarded for gold in harbour town eliminator

Unlock Assassin Cars in Burnout Legends:
Assassin Compact Car - Get 15 Takedowns
Assassin Coupe Car - Get 60 Takedowns
Assassin Muscle Car - Get 30 Takedowns
Assassin Sports Car - Get 100 Takedowns
Assassin Super Car - Get 150 Takedowns

Special Vehicles in Burnout Legends:
Play through the game on World Tour.

Firetruck - Get Gold on all Crash Events.
Gangster Boss - Get Gold in all Race events.
Cop Racer - Get Gold in all Pursuit events.

Unlocking Heavy Weight Vehicles in Burnout Legends:
Heavy Pick-Up - $1,000,000 in crash mode
4WD Racer - $2.000,000 in crash mode
SUV Deluxe - $5,000,000 in crash mode
4WD Heavy-Duty - $10,000,000 in crash mode
B-Team Van - $15,000,000 in crash mode
Delivery Truck - $20,000,000 in crash mode
Tractor Cab - $30,000,000 in crash mode
Longnose Cab - $50,000,000 in crash mode
City Bus - $70,000,000 in crash mode
Trash Truck - $90,000,000 in crash mode

Track Mirror in Burnout Legends:
Mode Collect all Legend Face-Off cars to unlock mirror mode (left-right reflected tracks) in single event.

Easy win in Pursuit mode:
It may seem odd but in Pursuit mode if you get in front of the car your chasing try crashing, if you manage to direct your car into the front of your rival it will often result in a takedown even the cars health bar is full !