Here is the full list of all 39 Mahjong by Microsoft (Mobile) achievements worth 1,000 gamerscore.
Completed every Daily Challenge in a month.
Won a Diamond Daily Challenge badge.
Made 10000 matches.
Completed the same puzzle 20 times.
Completed 10 Hard puzzles without using Reshuffle, Undo, or Hint.
Completed at least one Daily Challenge every day for a month.
Completed 10 chains of 5 or more.
Played the Daily Challenge 5 days in a row.
Completed 5 Expert puzzles without using a Reshuffle, Undo, or Hint.
Completed 4 different Expert puzzles.
Won 4 puzzles of different difficulty in a row from Easy to Expert.
Completed 4 puzzles using 4 different Tile Sets.
Completed 10 Quickplay puzzles.
After "No More Moves," undid 10+ moves in a row then won the puzzle.
Cleared the board with Golden Tiles being the last match on the board.
Matched a pair of Lightning Tiles with only 1 move left in countdown.
Made 1000 matches.
Matched three identical pairs in a row.
Matched the following tiles in sequence: N, E, S, W.
Completed the following puzzles in sequence: 2, 4, 8, 16.
Completed an Expert puzzle within 5 minutes.
Completed a Hard Puzzle.
Completed a Match Attack with at least 1 minute left on the timer.
Completed a puzzle within three turns after using a reshuffle.
Made 3 consecutive matches with flower tiles.
Completed a puzzle with total chains of 20 or above.
Completed a puzzle using the "Hint" button only twice.
Completed a puzzle within 3 minutes.
Matched 3 pairs of the same suit which count up or down.
Made 100 matches.
Changed the Tile Set.
Completed a puzzle.
Made 5 matches within 15 seconds.
Played your first Daily Challenge.
Completed your first Daily Challenge.
Win 12 Bronze Daily Challenge badges.
Win 10 Silver Daily Challenge badges.
Complete a Puzzle Pack.
Win 8 Gold Daily Challenge badges.