The Animal Farm Add-on for Mr. Prepper has 25 achievements worth 240 gamerscore.
Reach the novice fisherman rank
Reach the apprentice fisherman rank
Reach the advanced fisherman rank
Reach the expert fisherman rank
Reach the master fisherman rank
Find all the missing animals
Destroy the UFO
Visit the farm for the first time
Repair everything that can be repaired on the farm
Finish the 5th level of the night maze
Get abducted by the UFO
Escape the UFO
Pet all the animal types
Reach the 1st friendship level with Xeno
Reach the 2nd friendship level with Xeno
Reach maximum friendship level with Xeno
Unlock maximum maze level
Halloween achievement
Discover the lake
Catch golden fish
Catch all the fish types
Have the whole shelter powered by hamsters only
Collect 60 eggs from chickens
Collect 100 milk units by milking animals
Collect 30 units of honey from beehives