Here is the full list of all 30 Duo achievements.
Complete level 6 with 9 moves or less.
Complete level 5 with 18 moves or less.
Complete level 4 with 19 moves or less.
Complete level 3 with 12 moves or less.
Complete level 2 with 6 moves or less.
Complete level 1 with 8 moves or less.
Complete level 7 with 27 moves or less.
Complete level 8 with 36 moves or less.
Complete level 9 with 44 moves or less.
Complete level 10 with 49 moves or less.
Complete level 11 with 28 moves or less.
Complete level 12 with 47 moves or less.
Complete level 13 with 52 moves or less.
Complete level 14 with 35 moves or less.
Complete level 15 with 22 moves or less.
Complete level 16 with 43 moves or less.
Complete level 17 with 2 moves or less.
Complete level 18 with 7 moves or less.
Complete level 19 with 32 moves or less.
Complete level 20 with 40 moves or less.
Complete level 21 with 39 moves or less.
Complete level 22 with 43 moves or less.
Complete level 23 with 23 moves or less.
Complete level 24 with 27 moves or less.
Complete level 25 with 23 moves or less.
Complete level 26 with 20 moves or less.
Complete level 27 with 32 moves or less.
Complete level 28 with 28 moves or less.
Complete level 29 with 36 moves or less.
Complete level 30 with 21 moves or less.