Full list of all 45 Microsoft Sudoku (UWP) achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Windows.
Completed 500 puzzles
Reached Level 250
Won 12 Bronze Daily Challenge Badges
Completed 100 Puzzles
Won 10 silver Daily Challenge badges.
Won 8 Gold Daily Challenge Badges
Reached Level 100
Entered more than 500 Notes
Completed 3 puzzles of each difficulty
Completed 10 Expert puzzles without making mistakes
Solved 3 Expert puzzles in a row
Used 15 hints
Completed 10 Irregular puzzles
Completed 5 Hard puzzles
Completed an Expert puzzle
Completed a puzzle on each difficulty
Completed 5 Medium puzzles
Solved 5 Easy puzzles in a row
Completed all Daily Challenge Days of a month
Completed at least one Daily Challenge on each day of the month's calendar
Won a diamond Daily Challenge badge.
Solved 100 Irregular Shapes
Reached Level 30
Broke 250 ice blocks
Completed a Grandmaster puzzle
Completed a Master puzzle
Completed a Master puzzle without using Notes
Completed a puzzle where the last squares filled formed an “X” shape in the centre 3x3 block
Finished a puzzle by correctly placing 7 consecutive sevens
Completed a puzzle where the last nine consecutive moves are the numbers 1-9
Completed a puzzle by solving the centre cell last
Completed 5 puzzles without making mistakes
Placed 500 numbers correctly
Entered more than 100 Notes
Reached Level 10
Broke 4 ice blocks in a single move
Finished a puzzle by filling the corner cells last
Completed a puzzle without using Notes
Completed a puzzle with the "Show Remaining" setting turned off
Completed a puzzle with a theme that isn't named Simple
Completed a puzzle in less than 1 minute
Completed an Irregular Daily Challenge
Won your first Daily Challenge
Completed your first puzzle
Reached Level 2