Here is the full list of all 18 Force of Nature achievements.
Grow 1500 wheats
Cut down 1000 trees or bushes
Destroy 100 rocks
Sleep 10 times
Die 10 times
Run 42km
Get Force of Nature shard
Kill 20 rabbits
Die first time
Eat 100 coconuts or bananas
Grow 500 roses
Beat the game in Hardcore mode
Beat the game
Kill 2500 enemies
Kill 15 goblins
Kill 1000 goblins
Grow 100 sunflowers
Get level 2