Here is the full list of all 16 Farming Simulator 15 achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
You have completed 50 missions.
You have harvested more than 100 hectares.
The total area sown by you exceeds 100 hectares.
Your wealth has surpassed $10 million.
There is more than $5 million in your account.
You have harvested more than 10 hectares.
You have sown more than 10 hectares.
You paid back the entire bank loan.
Your account has reached more than 1$ million.
Your playing time in a single savegame has reached over 10 hours.
You have found all 100 gold coins.
You have found 50 gold coins.
You have found 25 gold coins.
Your total driving distance has increased to over 1000 mi.
You have covered more than 100 mi with vehicles.
You managed to reach a negative balance on your very first day.