Here is the full list of all 19 King's Heir: Rise to the Throne achievements worth 1,000 gamerscore.
Find all the Collectibles in the Main Story.
Finish a Minigame in less than 30 seconds.
Find all the Collectibles in the Bonus Chapter.
Place the crown on Randall's head.
Take a moment for a tankard of liquor.
Feed the animals, big and small.
Find half of all Collectibles in the Main Story.
Take a leap of faith into the water.
Finish a Hidden Object Puzzle in less than 20 seconds.
Finish 3 Hidden Object Puzzles without using Hint.
Finish the Lock Picking Minigame without using Skip.
Finish a Hidden Object Puzzle with less than 3 mistakes.
Find the first Collectible.
Finish the first Fight Minigame without using Skip.
Finish a Fight Minigame without making a mistake.
Finish the final Fight Minigame without using Skip.
Finish all the Hidden Object Puzzles without using Hint.
Pet all the animals, even if they run away.
Finish the game in Expert mode