Hold the Gas and Brake buttons before a race starts to perform a Burnout. This will rack up the boost in the meter when the race starts. In a strategic way, quickly press the boost button EXACTLY as the lights turned green to perform a boost start and already fill up the boost entirely.

To unlock an extra tour, do the following: drift over 65,000m, use over 50 Short Cuts, beat the target lap and race times by -200.0s, use over 60 weapons, and use over 425 items.

Bronze trophies
Aggro Racer - Sideswipe 75 opponents
Anonymous - Play an Ad Hoc race
Beat Down - Win your first Ad Hoc action race on a particular published track
Bruiser - Get a total of 200 takedowns
Busting Ghosts - Beat one ghost in Time Trial
Cashing In - Cash in an Item Pod 50 times
Dresser - Create a Mod in Mod Studio
Drifting Superstar - Earn 100,000 drift points in one drift
Fast Learner - Complete all the race tutorials
Fill 'Er Up - Fill your boost meter
Headspinner - Do a 1080 spin and land successfully
Knockin' Boost - Drive over 100 boost pads
Mechanic - Create a kart in Kart Studio
Offering Opinions - Rate 10 tracks, 10 Mods, and 10 karts
Pacifist - Win an action race in Career without firing any weapons
Pioneer Racer - Post the first Time Trial time on a published track
Post Cards for Everyone - Create a Post Card
Remixer - Remix a Mod, a kart, and a track
Say Cheese! - Use photo mode in a race or studio
Sculptor - Create a track in Track Studio
Sharing Karts - Publish a kart and have at least 10 people download it
Sharing Mods - Publish a Mod and have at least 10 people download it
Sharing Splines - Publish a track and have at least 10 people download it
Shields Up! - Successfully defend yourself with your shield 20 times
Shopping Spree - Enter the Shop
Slow and Steady - Win an action race in Career without using any boost or boost pads of any type
Startline Booster - Successfully boost off the line 20 times
Taster Session - Try all the game modes in Single Player Race
The Drifter - Drift 1,000 times in total
Third Eye - Hit 5 opponents with mines in a Career Race
Time Stamp - Post your time while in a time trial
Tour 1 Winner - Get 1st place overall in Tour 1
Tour 2 Winner - Get 1st place overall in Tour 2
Tour 3 Winner - Get 1st place overall in Tour 3
Tour 4 Winner - Get 1st place overall in Tour 4
Trigger Happy - Use all the weapons in the game

Silver trophies
Bonus Tour Winner - Get 1st place overall in the Bonus Tour
Bonus! - Complete all 5 Tours and pass the Career Stat thresholds
Hoarder - Collect all the tokens in the single player career
Join the Team - Beat all 30 developer best lap times in career
Level of Merit - Complete all the career challenges
Top of the Ladder - Place first on a time trial leaderboard
Tour 5 Winner - Get 1st place overall in Tour 5

Gold trophies
Dominator - Come 1st in every race in the career
ModNation Superstar - Achieve level rank 28
Star Creator - Earn at least 50,000 Create XP

Platinum trophy
ModNation Legend - Earn all Bronze, Silver, and Gold trophies.