Here is the full list of all 20 Edgar - there are Bokbok in Boulzac achievements.
Harvest 500 squashes
Read all the recipes
Save the village
Assemble the three elements at the altar
Get the dog toy
Get the snakeskin boots
Retrieve the lobster press
Get the artichokes
Returned home to have a rest
Rob the key from Michelle, er, Sophie
Chose the right book in the mayor's office
Leave the factory
Let Nestor brew a coctail for Carlos
Knock 100 times at the door
Head to the village
Harvest 100 squashes
Harvest 50 squashes
Harvest 10 squashes
Complete gardening tutorial
Leave your cabin