Here is the full list of all 27 Last Hope - there are Tower Defense achievements.
Become the savior of the wasteland.
The Stone spirit has been summoned!
Help the Chieftain to safely return to the village.
It's now safe to take a swim and clean yourself up.
Gear up! No good can come by following this road.
Force the Witch leave her crypt.
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!
Slay the evil zombie gorilla attacking the village.
Take down the great white vulture roaming the sky.
Take control over the highway and get rid of the maggot puking trucker.
End the reign of the Raider boss who attacked the camp.
Kill the dark hooded creature you've been hunting.
Bow before me zombies as I make the earth crumble.
Grandma and Grandpa, strike those zombies!
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!
He is tall, handsome and ready to rock & roll!
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?