Here is the full list of all 8 Lumber King achievements.
You cleared 20-5 and now it's all sands.
You did a million damage with one shot.
For you failed to kill that tree.
You got the skill "Psychic Of Lumber King".
You unlocked "Angel Lee".
Said the Iron Folk Tony.
The first time you hit a tree.
You fed the developer with all DLCs in your storage. Now all your damage will be doubled.