Full list of all 54 Overlord achievements worth 1,250 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 44 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 250 Gamerscore.
All achievements
Achievements they've won
Achievements they've not won
Win with the blackest heart
Collect all the Tower Objects
Harvest a massive amount of Lifeforce
Defeat all the Dungeon Creatures
Defeat half the Dungeon Creatures
Defeat the 7th Hero
Win with the clearest conscience
Get angry with a Hero
Steal a Hero
Get a full Horde, fully equipped
Forge an Ultimately Imbued Arcanium Set
Forge an Ultimately Imbued Durium Set
Forge an Ultimately Imbued Steel Set
End a Hero's obsession
Forge a full Arcanium set
Retrieve the most Powerful Smelter
Forge a full Durium set
Fulfill your Mistress's wishes
Cure a Hero of life
Retrieve a powerful Smelter
Win 50 ranked Slaughter matches
Win 10 ranked Slaughter matches
Complete a ranked Slaughter match
Win a ranked Slaughter match
Win 50 ranked Pillage matches
Win 10 ranked Pillage matches
Complete a ranked Pillage match
Win a ranked Pillage match
Last for 30 minutes in Survival
Last for 15 minutes in Survival
Last for 5 minutes in Survival
Retrieve the Tower Heart to power up the Tower
Retrieve a Crane to start rebuilding the Tower
Retrieve the Food, but will you keep or return it?
Puncture a Hero
Retrieve the Red Hive
Harvest Lifeforce
Get yourself a little company and some help spending your money
Put a Hero to sleep. Permanently.
Retrieve the Green Hive
Retrieve the Blue Hive
Retrieve a Smelter
Harvest lots of Lifeforce
Harvest a huge amount of Lifeforce
Defeat the 7th Hero in Legendary Mode
Win 25 ranked Expansion Slaughter matches
Win 25 ranked Expansion Pillage Maps
Last for 45 mins in a Expansion Survival Map
Conquer the Ruborian Desert Abyss
Conquer the Heavens Peak Abyss
Conquer the Evernight Forest Abyss
Defeat all the Expansion Dungeon Creatures
Conquer the Golden Halls Abyss
Conquer the Mellow Hills Abyss