Return Fire Codes -

Self-destruct:
Hold Square + X + Circle + Triangle to destroy the vehicle currently being controlled during game play. Hold L1 + L2 + R1 + R2 at the vehicle selection screen to destroy a vehicle in the current row.

Level	One Player Password
2	Umbrella, Bird, Butterfly, Flower
3	Face, Teapot, Bunny, Umbrella
4	Bunny, Umbrella, Bird, Bird
5	Flower, Umbrella, Bunny, Teapot
6	Bird, Teapot, Butterfly, Butterfly
7	Bear, Bear, Clover, Bird
8	Bunny, Teapot, Umbrella, Heart
9	Clover, Butterfly, Bird, Heart
10	Heart, Butterfly, Teapot, Heart
11	Umbrella, Umbrella, Bird, Flower
12	Flower, Teapot, Clover, Butterfly
13	Heart, Umbrella, Clover, Heart
14	Bunny, Face, Flower, Clover
15	Bunny, Face, Bear, Bird
16	Flower, Umbrella, Bird, Bunny
17	Flower, Bear, Heart, Umbrella
18	Face, Bird, Heart, Clover

Level	Two Player Password
2	Butterfly, Umbrella, Bear, Heart
3	Bear, Bunny, Flower, Clover
4	Umbrella, Heart, Clover, Flower
5	Umbrella, Bear, Bunny, Heart
6	Teapot, Bird, Butterfly, Flower
7	Heart, Flower, Clover, Butterfly
8	Heart, Bear, Bunny, Heart
9	Bear, Bunny, Clover, Flower
10	Butterfly, Face, Umbrella, Clover
11	Bear, Flower, Face, Flower
12	Teapot, Bear, Flower, Umbrella
13	Heart, Bird, Flower, Clover
14	Face, Bird, Clover, Teapot
15	Teapot, Bird, Clover, Bear
16	Umbrella, Teapot, Bird, Flower
17	Face, Bear, Bunny, Flower
18	Bunny, Heart, Flower, Bird

Extra levels:
Complete all the levels including the top set. Move up once more in the level select screen to access a row that does not display on the screen.