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