Here is the full list of all 21 Randoville achievements.
Regress for the first time
Get your first 20
Build 5 Zones
Spend an in-game week
Build 10 Fields
Throw the Dice 50 times
Have 10 or more peasants
Build 50 meters of fence
Get 100 stone from clicking rocks
Throw the Dice 10 times
Grab 100 lootables
Delete 100 trees
Spend an in-game month
Throw the Dice 100 times
Throw the Dice 250 times, wow
Nice progress, but it's not the end
You did it, Legend
Roll two 20s in a row
Plant 100 trees
Start fishing
Catch 25 fishes