Here is the full list of all 27 GLAD VALAKAS TOWER DEFENCE achievements.
Complete 1 wave of 1 chapter
Complete 2 wave of 1 chapter
Complete 3 wave of 1 chapter
Complete 4 wave of 1 chapter
Complete 5 wave of 1 chapter
Complete 1 wave of 2 chapter
Complete 2 wave of 2 chapter
Complete 3 wave of 2 chapter
Complete 4 wave of 2 chapter
Complete 5 wave of 2 chapter
Complete 1 wave of 3 chapter
Complete 2 wave of 3 chapter
Complete 3 wave of 3 chapter
Complete 4 wave of 3 chapter
Complete 5 wave of 3 chapter
Complete 1 wave of 4 chapter
Complete 2 wave of 4 chapter
Complete 3 wave of 4 chapter
Complete 4 wave of 4 chapter
Complete 5 wave of 4 chapter
Kill the boss
Complete chapter two without using skills
Get the first heart
Buy the first item in the store
Buy a second item in the store
Buy a third item in the store