Here is the full list of all 60 Lost in the Forest achievements.
Diamonds Collected 58
Diamonds Collected 59
Diamonds Collected 60
Diamonds Collected 55
Diamonds Collected 56
Diamonds Collected 57
Diamonds Collected 53
Diamonds Collected 54
Diamonds Collected 51
Diamonds Collected 52
Diamonds Collected 49
Diamonds Collected 50
Diamonds Collected 47
Diamonds Collected 48
Diamonds Collected 45
Diamonds Collected 46
Diamonds Collected 43
Diamonds Collected 44
Diamonds Collected 41
Diamonds Collected 42
Diamonds Collected 39
Diamonds Collected 40
Diamonds Collected 37
Diamonds Collected 38
Diamonds Collected 35
Diamonds Collected 36
Diamonds Collected 33
Diamonds Collected 34
Diamonds Collected 31
Diamonds Collected 32
Diamonds Collected 29
Diamonds Collected 30
Diamonds Collected 27
Diamonds Collected 28
Diamonds Collected 26
Diamonds Collected 25
Diamonds Collected 24
Diamonds Collected 22
Diamonds Collected 23
Diamonds Collected 21
Diamonds Collected 19
Diamonds Collected 20
Diamonds Collected 16
Diamonds Collected 17
Diamonds Collected 18
Diamonds Collected 15
Diamonds Collected 14
Diamonds Collected 13
Diamonds Collected 11
Diamonds Collected 12
Diamonds Collected 10
Diamonds Collected 8
Diamonds Collected 9
Diamonds Collected 7
Diamonds Collected 5
Diamonds Collected 6
Diamonds Collected 4
Diamonds Collected 3
NEW_ACHIEVEMENT_DESC_1_0
Coins Collected 2