Full list of all 21 A World of Keflings achievements worth 450 gamerscore. It takes around 6-8 hours to unlock all of the achievements in the base game.
The base game contains 12 achievements worth 200 Gamerscore, and there are 3 DLC packs containing 9 achievements worth 250 Gamerscore.
Helped out with building 100 buildings.
Adorned your world with 25 unique decorative pieces
Started 10 buildings the builders finished without you
Watched a kefling bounce through a long series of cannons
Expressed yourself with 20 different emotes. Strike a pose!
Received Collectibles from a friend. How sweet!
Finished the Giant's Gift. How relaxing!
Talked to the whole family of builder brothers.
Visited the Ice Kingdom, the Desert Kingdom, and the Forest Kingdom
Helped enhance your world with culture stars
Got to know Doug pretty well. Does he ever stop talking?
Thawed out poor frozen Doug
Helped build the Ubertronic Dynabot
Got past the meteor
Helped create a Nuclear Lobster
Helped restore Charlie to the Fudge Fortress
Helped find Augustus and his hidden treats
Saved the Caramel Lake
Saw the epic confrontation between Zombie-saurus and the Vampire Ape
Helped build the Franken-builder
Helped create a Scarecrow