Never give up!
Destroy 10 drones
Chicken wings
Destroy 25 drones
Destroy 50 drones
Exterminator
Rabbit in the hole
Trainhopper
Plumbird
Tutorial completed
Whisperer
World saver
Sentinel
Honeymoon
Unstoppable
Trainwreck
Feeding time
Shocking bird
Corn lover
Drivers license
Eating machine
Smarter than a cat
Smarter than a kid
Mech killer