Full list of all 10 Mahjong achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox Series X|S.
CLEAR 1 LEVEL
CLEAR 5 LEVELS
CLEAR 10 LEVELS
CLEAR 15 LEVELS
CLEAR 20 LEVELS
CLEAR 30 LEVELS
CLEAR 40 LEVELS
CLEAR 50 LEVELS
CLEAR 60 LEVELS
CLEAR 70 LEVELS