Here is the full list of all 14 Zavix Tower achievements.
Defeat Klopo on floor 15
Defeat the orc brothers on floor 20.
Loot 10 Epic items.
Defeat Pylemris on floor 10.
Loot one Epic item.
Beat Redrum on floor 5.
Defeat Ceethose on floor 25.
Defeat Baron Noddeg on floor 30.
Defeat Vulcanus on floor 35.
Defeat Ryaavaku on floor 40.
Defeat Ryaaksus on floor 45.
Defeat Magranus on floor 50.
Loot 25 Epic items.
Loot 100 Epic items.