Here is the full list of all 47 ModNation Racers: Road Trip trophies - there are 36 bronze, 7 silver, 3 gold and 1 platinum.
Earn all the ModNation™ Racers: Road Trip trophies to unlock this platinum trophy
Beat all 30 developer best lap times in career
Complete all the career challenges
Come 1st in every race in the career
Use all the weapons in the game
Collect all the tokens in the single player career
Win an action race in Career without using any boost or boost pads of any type
Drift 1,000 times in total
Earn 100,000 drift points in one drift
Successfully boost off the line 20 times
Get 1st place overall in the Bonus Tour
Cash in an Item Pod 50 times
Complete all 5 Tours and pass the Career Stat thresholds
Get 1st place overall in Tour 5
Try all the game modes in Single Player Race
Get 1st place overall in Tour 4
Complete all the race tutorials
Do a 1080 spin and land successfully
Successfully defend yourself with your shield 20 times
Get 1st place overall in Tour 3
Sideswipe 75 opponents
Get a total of 200 takedowns
Use photo mode in a race or studio
Create a Mod in Mod Studio
Create a track in Track Studio
Enter the Shop
Get 1st place overall in Tour 2
Drive over 100 boost pads
Fill your boost meter
Hit 5 opponents with mines in a Career Race
Get 1st place overall in Tour 1
Win an action race in Career without firing any weapons
Win your first Ad Hoc action race on a particular published track
Play an Ad Hoc race
Create a Post Card
Place first on a time trial leaderboard
Achieve level rank 28
Earn at least 50,000 Create XP
Publish a track and have at least 10 people download it
Publish a Mod and have at least 10 people download it
Publish a kart and have at least 10 people download it
Remix a Mod, a kart, and a track
Post the first Time Trial time on a published track
Beat one ghost in Time Trial
Rate 10 tracks, 10 Mods, and 10 karts
Post your time while in a time trial
Create a kart in Kart Studio