Here is the full list of all 21 Scamp: High Hat Havoc achievements.
Complete the Tutorial Level.
Complete the Hat Zone.
Find and free your master.
Collect a magic crystal.
Collect all 6 magic crystals.
Collect a coin.
Collect all the coins.
Unlock a skin for Scamp.
Unlock all of the skins for Scamp.
Collect the crystal from the high point in the cave without pulling the lever.
Complete the Hat Zone in less than 5 minutes.
Complete the Ring Course with more than 10 seconds left.
Complete the game in less than 1 hour.
Complete the game without dying once.
Behold the absolute state of the Wizard economy...
Help a wizard prep his dinner.
Help a wizard with his book.
Find and complete a secret obstacle course.
Beat the Ring Course Challenge.
Beat the game in under 45 minutes while unlocking the Gold Scamp skin along the way.
"Collect" the crystal at the bottom of the lake.