Here is the full list of all 15 Race me now achievements.
Win 100 games
Buy all cars
Buy all cars in Super category
Buy all cars in Sport category
Buy all cars in Muscle category
Buy all cars in Street category
Win 10 races
Finish a race last
Win all races in a season
Win a race in Winter Ocean
Win a race in Winter Valley
Win a race in Summer Lake
Win one game
Win a race in Summer Valley
Buy your first car