Here is the full list of all 31 American Farmer achievements.
Pay to spray for bugs.
Pay for a hired hand.
Player 4 wins the game!
Player 3 wins the game!
Buy at least 100 crops.
Player 2 wins the game!
Land on fire!
Play a game with 8 computer players.
Play a game with 8 players.
Play a game with 8 human players.
Attempt to play a game with 0 players. Wait what?
Player 1 wins the game!
Sell at least 100 crops.
Sell at least 10 crops.
Buy at least 10 crops.
Pay for manure.
Land on drought!
Pay for irrigation.
Land on flood!
Use the mud card.
Play a game with 2 players.
Buy at least 1000 crops.
Sell at least 1000 crops.
Sell crops for $100.
Sell crops for $350.
Go bankrupt from a fee.
Player 5 wins the game!
Player 6 wins the game!
Player 7 wins the game!
Player 8 wins the game!
Land on locust!