Here is the full list of all 17 Puzzler World 2 achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Complete 10 Sum Up puzzles
Complete 10 Add Up puzzles
Complete 10 Sudoku puzzles
Complete 10 Wordsearch puzzles
Complete 10 Jigsaw puzzles
Complete 10 Silhouette puzzles
Complete 10 Pieceword puzzles
Complete 10 Chainletter puzzles
Complete 10 Pairs puzzles
Complete 10 Link-A-Pix puzzles
Complete 10 Picture Quiz puzzles
Complete 10 Hide And Seek puzzles
Complete Hangman puzzles
Complete 10 Fitword puzzles
Complete 10 Crossword puzzles
Complete 10 Splitword puzzles
Complete 10 Backword puzzles