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