Here is the full list of all 55 Cupid Nonogram achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Completed Stage 54
Completed Stage 53
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Completed Stage 55
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Completed Stage 34
Completed Stage 42
Completed Stage 38
Completed Stage 33
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Completed Stage 6
Completed Stage 5
Completed Stage 4
Completed Stage 3
Completed Stage 2
Completed Stage 1