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