Here is the full list of all 9 Once Upon a Jester achievements.
Play the right tune for all Callers during Jerry Jeremy’s radio show performance.
Pop the frog into popcorn over the campfire.
Unlock all stickers.
Find the fish.
Find Pesto.
Steal the Royal Diamond.
Make the perfect smikkel.
Finish the game!
Watch Freek get pulled into the sea by the kraken.