ACHIEVEMENT - HOW TO UNLOCK Early Days! (10) - Win a point in a multiplayer battle. Elite Champion (15) - Earn at least Bronze in all the Elite Challenges. First Steps (10) - Beat a Supersonic ghost. I am the best! (15) - Win a multiplayer battle. No one can beat me! (20) - Win 10 multi-player battles Silver Arrow (20) - Earn at least Silver on all Challenges. Skill Chief (15) - Earn at least Bronze in all the Skill Challenges. Speed King (15) - Earn at least Bronze in all the Speed Challenges. Supreme Being (25) - Earn Gold on all Challenges. Weapon Master (15) - Earn at least Bronze in all the Weapon Challenges. Weapons Officer (20 points): Use every weapon in the game. Grease Monkey (20 points): Unlock all the car upgrades.