Here is the full list of all 25 The Deadly Tower of Monsters achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Complete 18 waves in survival mode
Complete all other achievements
Reach the captain of the ghost pirate ship
Kill 3 enemies with parried projectiles
Kill 3 enemies with one landmine
Find 6 missing film reels
Destroy 25 target boards
Find the castaway ape
Remove 5 apes with watches from the set
Kill 10 enemies by jumping on them
Parry 20 enemy attacks
Defeat the gigantic mutant octopus
Fly through 50 hoops
Destroy Dr. Schopenstein's replicator
Max out 3 melee weapons
Destroy 10 target boards
Destroy all the mutant dinosaur eggs
Defeat the Mechameleon
Max out 3 projectile weapons
Fly through 20 hoops
Defeat the Mega-Gorilla
Conquer the Nukular ant hive
Guide 10 enemies into flaming turrets
Kill a large dinosaur with a dagger
Rescue Dick from the Mega-Gorilla