Here is the full list of all 20 Microsoft Sudoku (JP) (Windows) achievements worth 200 gamerscore.
Complete your first puzzle
Complete 100 Puzzles
Win your first Daily Challenge
Solve 100 Irregular Shapes
Complete a puzzle on Expert difficulty without using any Guides or helper functions
Win 12 Bronze Daily Challenge Badges
Win 8 Gold Daily Challenge Badges
Complete all Daily Challenges in a month
Complete a puzzle on each difficulty
Solve a puzzle using all three Guide types, and consuming all the hints
Draw 50 numbers on the board using a stylus OR place 500 numbers
Finish a Symbol Sudoku puzzle by placing the last symbol in the exact center of the board
Solve 5 Very Easy puzzles in a row
Solve 3 Expert puzzles in a row
Log in each day of an entire month and complete at least one Daily Challenge
Complete a puzzle without using Notes
Complete a puzzle in less than 1 minute
Use Show all Notes and then use Erase Notes with no other actions inbetween
Complete a puzzle where the last seven moves you make are correctly placing sevens
Fill the board, leaving empty squares in an "X" shape in the center 3x3 block