Here is the full list of all 52 Statue Defender achievements.
Slay the red dragon boss.
Slay the beholder.
Slay the vampire lord.
Kill an Arcane bomber.
Kill 10 Arcane bombers.
Kill 100 Arcane bombers.
Kill a Bat.
Kill 10 Bats.
Kill 100 Bats.
Kill a Bloodsucker.
Kill 10 Bloodsuckers.
Kill 100 Bloodsuckers.
Kill a Boomant.
Kill 10 Boomants.
Kill 100 Boomants.
Kill an Evileye.
Kill 10 Evileyes.
Kill 100 Evileyes.
Kill a Firemage.
Kill 10 Firemages.
Kill 100 Firemages.
Kill a Flyingspitter.
Kill 10 Flyingspitters.
Kill 100 Flyingspitters.
Kill a Halfling.
Kill 10 Halflings.
Kill 100 Halflings.
Kill a Halfling bomber.
Kill 10 Halfling bombers.
Kill 100 Halfling bombers.
Kill a Orc rogues.
Kill 10 Orc rogues.
Kill 100 Orc rogues.
Kill an Orc warrior
Kill 10 Orc warriors.
Kill 100 Orc warriors.
Kill a shadow.
Kill 10 shadows.
Kill 100 shadows.
Kill a Skeleton warrior.
Kill 10 Skeleton warriors.
Kill 100 Skeleton warriors.
Kill a Blonde mage.
Kill 10 Blonde mages.
Kill 100 Blonde mages.
Kill a Stone golem.
Kill 10 Stone golems.
Kill 100 Stone golems.
Kill a Vampire mage.
Kill 10 Vampire mages.
Kill 100 Vampire mages.
Slay the Medusa.