Here is the full list of all 37 NASCAR '15 trophies - there are 21 bronze, 11 silver, 4 gold and 1 platinum.
Obtain all the other Trophies.
Make it to pit road with a flat tire
Win the Sprint Cup in Career on at least 90% difficulty
Participate in 100 Online Races
Participate in 50 Online Races
Win 20 Online Races
Make a custom brush in the Paint Booth
Save an Online Replay
Research everything in the R&D department
Run a custom tuning setup in a race
Run 10 laps in a single Track Testing session
Drive as 10 different drivers
Win 10 Online Races
Win a race while driving a Toyota
Be the Lucky Dog driver in a race
Win a race with the HUD turned off
Start and finish a race without any driving assists
DNF from a race by critically damaging your car
Be involved in a wreck at Talladega
Win the Sprint Cup in Single Season Mode
Win a League Season
Win the Sprint Cup in Chase Mode
Win a race while driving a Chevy
Win the Sprint Cup in Career
Finish your first Sprint Cup Season in Career
Qualify on Pole 20 times
Sign 10 Sponsors to your car
Pass a total of 250 cars
Win the All-Star Race
Win your first Online Race
Take part in an Online Race
Invest in all areas of the Race Shop
Create a custom paint scheme
Win a race while driving a Ford
Win a race after Qualifying first and leading the most laps
In Career, win a race using only refurbished parts
Take a picture using Photo Mode