Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.

Achievement	How to unlock
Bowled Over	Kill 10 chickens with one throw of a boulder - strike!
Defender of the Flock	Complete a level featuring the nighttime predator without letting it eat any animals.
Don't Fence Me In	Knock ver 50 fences with a cow (aggregate total).
Fertilizer	Use cows to make 50 piles of poo (aggregate total).
First Flock!	Complete first level.
Good Shepherd	Flock 25 animals at once.
King of the Skies	Fly and land 75 chickens (aggregate total).
Love Bunny	Use 3 love patches in 3 minutes.
Lumberjack the Ripper	Rip up 50 trees (aggregate total).
Make Your Mark	Complete 10 crop circles (aggregate total).
Master Flocker	Get a perfect abduction on all levels, singleplayer and multiplayer.
The Continuous Cartographer	Play through one user-created singleplayer level and one user-created multiplayer level.
Unidentified Flocking Object	Abduct 20 animals (aggregate total).