Here is the full list of all 28 Adventures Of Pipi achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Complete 1 lvl
Complete 10 lvl
Complete 2 lvl
Complete 3 lvl
Complete 4 lvl
Complete 5 lvl
Complete 8 lvl
Complete 9 lvl
Complete 11 lvl
Complete 12 lvl
Complete 17 lvl
Complete 18 lvl
Complete 20 lvl