Muscle Car: find 4 keys in any track; press down at gear selection screen.
Hot Rod (Rocket Car): find 8 more keys in the other tracks; press down at the gear selection screen.
City Bus: find all 16 keys; press down at gear selection screen.
Police Car: finish 1 player GP Mode; press down at gear selection screen.
Taxi Cab: finish 1 player Circut mode; press down at gear selection screen.
After crossing the Golden Gate Bridge, there is a hill on the left there is a key way to the left. After going through the first bridge, there is a fence you can break through. The key is on the opposite side of the left hill. Next, there is a key hidden after you get out of the last secret. Instead of going right out of the road, go to a little corner on the left. Last, After crossing the checkpoint where the finish would be, turn left hard. There is a little tunnel. Take it but slow down towards the end. Stay on the little piece of green and turn left. The key is there.
Track 2:
There are four keys in track 2. The first key is where you see a danger sign go to the
left. You should see a yellow ramp. Go slow around it and turn real hard. Right behind the
ramp is the first key. The second key is right when the road splits into two parts. Go to
the left and go off the jump, but stay to the left side of the road. Whenm you hit the
jump if you are going fast enough you will land on a road, but you have to hit the brakes
hard and turn around. Go back, but don't fall off. You will see a key to the left when you
turn around. The third key is when you see the large truck, go under it and hit the ramp.
If you hit it just right you will land on the top of a building. Follow the rooftops until
you see the third key. The last key is located right after you get the third key you have
to hit the ramp and jump onto the other rooftop. When you get on the other rooftop you
have to go through the cones and land in the grass. Drive through the grass until you see
the key. Once you get the key all you have to do is finish the race.
Track 3:
Off of the start turn right hard into a little maze and there is the key. Next, After that
first big turn, there is a little hill. Instead of going right, go left and the key is on
the right side of the right house. After the huge jump, befor the turn, there is a little
cut of wedge in the building. The key is there. And last, go stright over a few ramps and
jump over the wall. But, you must turn around and the key is right next to the wall.
Track 4:
The first key is next to the ramp you go down. After going on it, turn around and go the
other way next to the ramp. To get the next one is very very hard. You must avoid the big
turn by going over the ramp through the building. But, you have to stay on the next
platform after he ramp. The key is there. The next key is in the right tunnel when the
road forks, go left and then turn left when the road gets straight. Go through the right
tunnel. And the last key is on the left side of the left box near the shortcut under the
building.
After going through the tunnel, go throught the fence to the left. After going through the city bear to the left shoulder. Right after the finish line go into the grass and go through the little tunnel.
On Track 2:
Go through the little tunnel to the left near the beginning. Instead of going right, go
left off the ramp. Go under the truck to get the key.
On track 3:
In the beginning, go straight through the building. After the big jump, go over the little
one and go left (key). After the long stretch of road keep going straight.
On track 4:
To avoid the sharp turn, after going down the ramp, go right off the ramp. Go left on the
fork, and then go left through the tunnel.