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