Successfully complete the following tasks during gameplay to unlock the corresponding character.

Unlock Tia:
Get up to 250 mph.

Unlock Sonny:
Get up to 300 mph.

Unlock Hollister:
Do 100 Piston Cup races.

Unlock Lee Jr.:
Do 500 Road races.

Unlock DJ:
Win a race in Hard setting.

Unlock Fillmore:
Win his Boost race in Hard setting.

Unlock Mia:
Do the Hardest mode in Monster Mayhem.

Unlock Boost:
Win a race in SuperHard setting.

Unlock Mack:
Unlock everything on 2 Profiles.

Unlock Vince:
Complete Sheriff's Hot Pusuit.

Complete the following tasks to unlock the corresponding effect

Unlock Ramone:
Beat Mirror Cup

Unlock Flo:
Beat Gran Prix Cup 3

Unlock Mirror Cup.
Collect ALL the Postcards on Postcard Rally mode on Story mode

Unlock Alternate Paint for DJ:
On the Radiator Cap Run track beat the best time

Unlock Alternate Paint for Sheriff:
On the Ironhorse Junction track beat the best time

Unlock Alternate Paint for Luigi:
On the Deisel Forest track beat the best time

Unlock Alternate Paint for Sarge:
On the Frank's Field track beat the best time

Unlock Alternate Paint for Chick:
Beat the best time on the Speedway track

Unlock Alternate Paint for Snot Rod:
On Turbine Canyon beat the best time

Unlock Alternate Paint for Doc Hudson:
On Mesa Ravine beat the best time

Enter the following codes to unlock the corresponding effect.

Unlock ALL Cars:
Enter YAYCARS as a code

Unlock ALL Races:
Enter MATTL66 as a code

Unlock ALL Paint Jobs:
Enter R4MONE as a code

Unlock Super Fast Start:
Enter IMSPEED as a code.

Unlock Infinite Boost:
Enter VROOOOM as a code

Unlock ALL Tracks and Mini-Games:
Enter IF900HP as a code

Unlock Maters Speedy Circuit and Maters Countdown Cleanup:
Enter TRGTEXC as a code

Unlock Drive on Fire:
Enter TORCHED as a code

Unlock ALL Movies:
Enter WATCHIT as a code

Unlock ALL Concept Art:
Enter CONC3PT as a code

Race as #33 Race Car:
Enter DUN33LI as a code

Race as Boost:
Enter CHEATER as a code

Race as DJ:
Enter MUSIC8R as a code

Race as Fillmore:
Enter PEACEOT as a code

Race as Fletcher:
Enter RACEKAR as a code

Race as Lizzie:
Enter OLDY2D0 as a code

Race as Luigi:
Enter CASEDEL as a code

Race as Mia and Tia:
Enter MCQNL94 as a code

Race as Sarge:
Enter BOOTCMP as a code

Race as Tractor:
Enter FRANKSB as a code

Race as Woody the Wagon:
Enter PIXARFY as a code

Race as Monster Truck #1:
Enter MONAR02 as a code

Race as Monster Truck #2:
Enter GOOGLER as a code