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