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.
Saved a Picnic, Got a Wedzel Patch, Completed the Potion.
Opened door to Achaka three times.
Fed a steak to a Wedzel Wolf.
Told the Story about becoming a Knight.
Defeated Whisper in the Duel of Speed.
Defeated Acorn in the Duel of Strength.
Presented an Eye to enter the Tournament.
Danced in the Dark.
Walked on Water.
Tried to Catch a Toad, Got a Frog in Throat.
A Dyed Badger ate Bees.
Blew on many Horns.
Walked into the Spiniferous Thornweeds.
Was a Snack for a Majestic Unicorn.
Found a Mysterious Cave Entrance.
Walked into a Dragon's Mouth.
Took a Brief Nap.
Tummy troubles
Escaped without any townspeople taken away
Found all pages in Chapter 2.
Reunited two best friends
Completed Chapter 2
Escaped the goblin prison
Found all gold in Chapter 2.
Healed Bramble
Got some air
Gave the perfect present to Neese.
Spared the life of a Wedzel Wolf.
Discovered 3 portraits of younger townspeople.
Won a game of Moral Quarrel.
Watch out, Graham!
Gave the perfect present to Vee.
Completed Chapter 3
Solved a puzzle on the beach.
This tower was built to scale.
Heard everything Alexander had to say
Pestered the Prince
Don't make me turn this story around!
Completed Chapter 4
Shot an arrow at Ice Guard
Solved the Ice Labyrinth
Solved first Ice Palace puzzle
Won the road trip game
Lasted as long as I could in staring contest.
Defeated all the puzzles on The Floating Island.
Proved your mind is still strong.
Tickled the ivories of a bone xylophone.
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.