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