Here is the full list of all 100 Choco Pixel X achievements.
Level 28
Symbol 2
Level 27
Symbol 1
Level 26
Z
Level 25
Y
Level 24
X
Level 23
W
Level 22
V
Level 21
U
Level 20
T
Level 19
S
Level 18
R
Level 17
Q
Level 16
P
O
Level 15
N
Level 14
Level 13
M
L
Level 12
Level 11
K
Level 10
J
Level 9
I
Level 8
H
Level 7
G
Level 6
F
Level 5
E
D
Level 4
C
Level 3
Level 2
B
Level 1
A
Level 29
Level 30
Level 31
Level 32
Level 33
Level 34
Level 35
Level 36
Level 37
Level 38
Level 39
Level 40
Level 41
Level 42
Level 43
Level 44
Level 45
Level 46
Level 47
Level 48
Level 49
Level 50
Symbol 3
Symbol 4
Symbol 5
Symbol 6
Symbol 7
Symbol 8
Symbol 9
Symbol 10
Symbol 11
Symbol 12
Symbol 13
Symbol 14
Symbol 15
Symbol 16
Symbol 17
Symbol 18
Symbol 19
Symbol 20
Symbol 21
Symbol 22
Symbol 23
Symbol 24