Here is the full list of all 20 Edgar: Bokbok in Boulzac achievements worth 1,000 gamerscore.
Leave your cabin
Finish the gardening tutorial
Harvest 10 squashes
Harvest 50 squashes
Harvest 100 squashes
Harvest 500 squashes
Head to the village
Knock 100 times at the door
Get the cockail from Nestor
Leave the Factory
Choose the right book in the mayor's office
Rob the key from Michelle, er, Sophie
Return to your Home, have a rest
Get the artichokes
Retrieve the lobster press
Get the snakeskin boots
Get the dog toy
Assemble the three elements at the altar
Save the village
Read all the recipes