Unlock Bat and Pork Choppers To unlock the Bat and Pork helicopters, beat all of the rescue missions. Unlock Chase Car Mode
To unlock what is known to the Germans as "Chase Car Mode" earn an A rating on all missions and an S on the Bus Chase.
Achieve an S rating in Final Rescue Mode to unlock Disaster Mode.
To unlock the Final Rescue Mode, earn an S rating with the Sports Car.