Here is the full list of all 100 Game Of Puzzles: Nature achievements.
Complete level 100
Complete level 99
Complete level 98
Complete level 97
Complete level 96
Complete level 95
Complete level 94
Complete level 93
Complete level 92
Complete level 91
Complete level 90
Complete level 89
Complete level 88
Complete level 87
Complete level 86
Complete level 85
Complete level 84
Complete level 83
Complete level 82
Complete level 81
Complete level 80
Complete level 79
Complete level 78
Complete level 77
Complete level 76
Complete level 75
Complete level 74
Complete level 73
Complete level 72
Complete level 71
Complete level 70
Complete level 69
Complete level 68
Complete level 67
Complete level 66
Complete level 65
Complete level 64
Complete level 63
Complete level 62
Complete level 61
Complete level 60
Complete level 59
Complete level 58
Complete level 57
Complete level 56
Complete level 54
Complete level 55
Complete level 53
Complete level 52
Complete level 51
Complete level 50
Complete level 49
Complete level 48
Complete level 47
Complete level 46
Complete level 45
Complete level 44
Complete level 43
Complete level 42
Complete level 41
Complete level 40
Complete level 39
Complete level 38
Complete level 37
Complete level 36
Complete level 35
Complete level 34
Complete level 33
Complete level 32
Complete level 31
Complete level 30
Complete level 29
Complete level 28
Complete level 27
Complete level 26
Complete level 25
Complete level 24
Complete level 23
Complete level 22
Complete level 21
Complete level 20
Complete level 19
Complete level 18
Complete level 17
Complete level 16
Complete level 15
Complete level 14
Complete level 13
Complete level 12
Complete level 11
Complete level 10
Complete level 9
Complete level 8
Complete level 7
Complete level 6
Complete level 5
Complete level 4
Complete level 3
Complete level 2
Complete level 1