Here is the full list of all 27 Ballpoint Universe - there are Infinite achievements.
The end of a page.
The boss of the logicians, your enemy?
Completed "Clearing a Path" flawlessly!
Completed "Treetop Battle" flawlessly!
Completed "Stolen Artifact" flawlessly!
Completed "Defenders of the Elder" flawlessly!
The elder revealed the truth of this age for you.
Completed "Face Off" flawlessly!
Completed "The Owls" flawlessly!
Completed "Counter Attack" flawlessly!
Passed wave 48 in Infinite Mode.
Passed wave 60 in Infinite Mode! Wow!
Completed "The Demented Doodles" flawlessly!
Completed "Brethren" flawlessly!
The hotspot for creativity!
Completed "Training on the rocks" flawlessly!
Passed Wave 8 in infinite mode.
Passed wave 16 in Infinite Mode.
Passed wave 24 in Infinite Mode!
Passed wave 36 in Infinite Mode.
Completed "The Battleship" flawlessly!
Completed "Target Practice" flawlessly!
You are a good enough idea.
Welcome to the Spring!
Completed "The Lost Fortress" flawlessly!
Completed "Stone Dragon" flawlessly!
Things might get weird from here.