No missable achievements (plus 27 unknown)
Sign in with Steam or Xbox to track your progress, and:
Welcome to the Spring!
You are a good enough idea.
The hotspot for creativity!
Passed Wave 8 in infinite mode.
Completed "Training on the rocks" flawlessly!
Completed "Target Practice" flawlessly!
Passed wave 16 in Infinite Mode.
Completed "The Demented Doodles" flawlessly!
Completed "The Battleship" flawlessly!
Completed "Treetop Battle" flawlessly!
Completed "Brethren" flawlessly!
Completed "The Owls" flawlessly!
The elder revealed the truth of this age for you.
Completed "Counter Attack" flawlessly!
Passed wave 24 in Infinite Mode!
Completed "Defenders of the Elder" flawlessly!
The boss of the logicians, your enemy?
Completed "Clearing a Path" flawlessly!
Completed "Face Off" flawlessly!
Completed "Stolen Artifact" flawlessly!
Passed wave 36 in Infinite Mode.
Completed "Stone Dragon" flawlessly!
Completed "The Lost Fortress" flawlessly!
Passed wave 48 in Infinite Mode.
Passed wave 60 in Infinite Mode! Wow!
Things might get weird from here.