Here is the full list of all 39 Revhead achievements.
Win a street race
Buy your first car
Collect 500 mechanical points
Collect 500 dealer points
Collect 500 racing points
Unlock Revhead level
Be first in all Backyard races
Be first in all Imalona races
Be first in all Dooga Mine races
Be first in all Gutta Races
Be first in all Yanagin Forest
Be first in all Mount Yanagin races
Be first in all Dooga Lake drag races
Get Gold time for all time trial races
Win a pink-slip race
Reach 500 km/h at Bullet Run
Unlock all race locations
Finish 1600m drag race within 12s
Finish 800m drag race within 6s
Finish 400m drag race within 5s
Win all Walea races
Win all Buthanbang races
Win all Wanja races
Win all Panania races
Win all Magura races
Win all Jingu races
Win all Narnoo races
Tow-in at least 10 cars
Find 10 wrecks in Outland
Restore 3 cars
Sell a car for over $100000
Own one car from each brand.
Fill your petrol tank 1000 times
Make a total purchase of $100000 in a shop
Sleep 5 days in a row
Play over 1 year (in game time)
Race with a smoky car.
Race with a broken car from start to finish.
Earn $10000 via small jobs at Charlie