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