Full list of all 53 King's Quest achievements worth 1,800 gamerscore. It takes around 4-5 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 17 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 36 achievements worth 800 Gamerscore.
Told the Story about becoming a Knight.
Saved a Picnic, Got a Wedzel Patch, Completed the Potion.
Defeated Acorn in the Duel of Strength.
Blew on many Horns.
Tried to Catch a Toad, Got a Frog in Throat.
Defeated Whisper in the Duel of Speed.
Opened door to Achaka three times.
Danced in the Dark.
Walked into the Spiniferous Thornweeds.
Presented an Eye to enter the Tournament.
A Dyed Badger ate Bees.
Fed a steak to a Wedzel Wolf.
Walked on Water.
Was a Snack for a Majestic Unicorn.
Walked into a Dragon's Mouth.
Took a Brief Nap.
Found a Mysterious Cave Entrance.
Found all pages in Chapter 2.
Reunited two best friends
Completed Chapter 2
Escaped the goblin prison
Escaped without any townspeople taken away
Found all gold in Chapter 2.
Tummy troubles
Healed Bramble
Got some air
Gave the perfect present to Vee.
Gave the perfect present to Neese.
Completed Chapter 3
Spared the life of a Wedzel Wolf.
Solved a puzzle on the beach.
Discovered 3 portraits of younger townspeople.
Won a game of Moral Quarrel.
This tower was built to scale.
Watch out, Graham!
Completed Chapter 4
Shot an arrow at Ice Guard
Solved the Ice Labyrinth
Heard everything Alexander had to say
Pestered the Prince
Solved first Ice Palace puzzle
Don't make me turn this story around!
Won the road trip game
Lasted as long as I could in staring contest.
Tickled the ivories of a bone xylophone.
Defeated all the puzzles on The Floating Island.
Proved your mind is still strong.
Proved your mind is still quick.
Escaped the Tournament Theater.
Found some very old pastries.
Remembered a forgotten tune.
Honored the bridges of the past.
Sought treasure as an aged adventurer.