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.
Complete round 200
Max an Items Level
Complete 10 researches
Find your first legendary item!
Destroy your first Mega Boss
Reach Experience Level 40
Have 1 million gold in your pouch
Finger Bang the screen over 100000 times
Complete your first research
Unlock the mage tower.
Stock up over 50 gems
Defeat The First Boss.
Fingerbang the screen over 100 times
Max 5 Legendary Items