Sonic Free Riders

Borad Unlock:
Chaos Emerald Board  Get all S rank's on all the Story Missions
Professional Board  Do all Trial Missions

Unlockable Characters:
Amy, Cream, Vector, Shadow, Rouge & E 10000 G:
Complete both Team Heroes & Babylon missions.
Blaze & Silver:
Completed both Team Rose & Dark missions.
Dr. Eggman & Metal Sonic:
Complete the whole Grand Prix campaign.

 