Here is the full list of all 27 Last Hope - there are Tower Defense achievements.
The reign of terror might be finally over!
End the reign of the Raider boss who attacked the camp.
Bow before me zombies as I make the earth crumble.
You are the toughest zombie fighter out there!
The Stone spirit has been summoned!
Kill the dark hooded creature you've been hunting.
We've been looking everywhere for this!
Don't trust anyone who's acting too friendly.
If you've gotten poisoned, our medicine man can help you.
Force the Witch leave her crypt.
Turn up the watts and fry the zombie brain circuits!
If a small turret won't work, try a big one!
Take out a target from far away, making them head pop!
A lot of airplanes but no one to fly them.
Take control over the highway and get rid of the maggot puking trucker.
Gear up! No good can come by following this road.
Take down the great white vulture roaming the sky.
It's now safe to take a swim and clean yourself up.
Help the Chieftain to safely return to the village.
Slay the evil zombie gorilla attacking the village.
Grandma and Grandpa, strike those zombies!
He is tall, handsome and ready to rock & roll!
Let the justice decide the fate of the zombies.
Equipped with homemade armor, mines and shoguns.
He is not only capable of acting in the shadows.
Who is in need of both firepower and healing?
Become the savior of the wasteland.