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