You Maniacs!
Defeated the City Transformer in a multi-player game.
50 
Bot in the City
Defeated the City Transformer!
25 
Can't Touch This
Raced all 8 tracks in one sitting and completed the final track with full shields.
20 
Lead Foot
Completed all 8 courses in under 40 minutes.
20 
Full Arsenal
Obtained all weapons at least once.
15 
Leader of the Pack
Earned 1 million coins.
15 
Tentacled and Dangerous
Won a multiplayer ranked match!
15 
Speed Limit
Completed a track having reached at least 250 mph.
10 
Lead Foot Jr.
Completed a course in under 3 minutes.
10 
Arachnosplat!
Defeated the Giant Spider!
10 
Money Bags
Collected 1000 coins.
5 
Plays Well with Others
Played a multiplayer game online.
5