Here is the full list of all 28 Super Woden GP 2 achievements.
You have 10 cars
You have visited the music room.
You've earned 25 Stars.
Win your first Rally
You have driven more than 100 kilometers.
You reached 200 Km/h
You have 5 cars
You've earned 10 Stars.
You've changed the oil.
You have washed your car.
Install an upgrade for the first time.
You've won your first race.
You bought your first car.
Welcome to Super Woden GP 2.
You have 25 cars!
You have 50 cars!
You have... 100 cars.
You've earned 50 Stars.
You reached 300 Km/h
You don't like to wash the car.
You have driven more than 500 kilometers.
You have driven more than 3.000 kilometers.
You have driven more than 5.000 kilometers.
You've won the World Championship.
You have completed the normal route with one credit.
You have completed the hard route with one credit.
You have won the 400s World Rally Championship.