Here is the full list of all 17 Grow Defense achievements.
Defeat 5 Unique Mega Bosses
Reach Mastery Level 3
Complete 10 researches
Complete round 200
Max out Rockets for the Rocket Launcher.
Find your first legendary item!
Max an Items Level
Destroy your first Mega Boss
Reach Experience Level 40
Have 1 million gold in your pouch
Finger Bang the screen over 100000 times
Stock up over 50 gems
Complete your first research
Unlock the mage tower.
Fingerbang the screen over 100 times
Defeat The First Boss.
Max 5 Legendary Items