Full list of all 49 Overlord II achievements worth 1,000 gamerscore. It takes around 35-40 hours to unlock all of the achievements on Xbox 360.
Juno has become your Mistress
Through Domination or Destruction you are now the Tyrant of Everlight
You've obtained the Green Minions
You've rescued the Blue Minions
You have built 50% of the Tower buildables
You've collected 50% of all Dark Crystals
You have forged a weapon
You have rescued all the Minion crew from the spider webs
You have gathered 1000 Lifeforce orbs
You have killed Solarius
You have killed 100 baby seals
Dark Fay is now your 'special' friend
Kelda is now your 'special' friend
Juno is now your 'special' friend
Dark Fay has become your Mistress
You have discovered and used all Minion Mounts in the game
Kelda has become your Mistress
Through Domination or Destruction you are now the Tyrant of Nordberg.
You have gathered 250 Lifeforce orbs
You've found the Red Minions
You have achieved 50 melee kills
You have gathered 10 Lifeforce orbs
You've killed 15 or more enemies with a single Catapult boulder
You've caused mayhem during the Prelude
Kill Dark Fay to turn her into Ghost Fay
Fully upgrade all 50 Minions in your Horde
Achieve 50 kills by overcharging your Evil Presence Spell
Build 100% of the Tower buildables
Achieve a 100% Domination Tyranny rating
Achieve a 100% Destruction Tyranny rating
Obtain all the Tower Objects in the game
Collect 100% of all Dark Crystals
Kill 1000 Gnomes
Collect 50,000 gold
Buy gifts for Ghost Fay and woo her into becoming your 'special' friend
Win one Pirate Plunder map
Win ten Pirate Plunder maps
Win one Dominate map
Win ten Dominate maps
Kill an opposing Overlord 20 times in ranked versus matches
Forged the Elemental helmet and armor
Forge three weapons
Forge the Infernal helmet and armor
Gather 5000 Lifeforce orbs
Destroy one Town
Destroy both Nordberg and Everlight
Enslave one Town
Enslave both Nordberg and Everlight
Find a way for you and your three Mistresses to become 'special' friends