Here is the full list of all 50 Hentai IQ Puzzle achievements. It takes around 0-1 hour to unlock all of the achievements.
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777
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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1
2
3
4
5
6
7
8
9
10
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cube
CUBEE
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A