Here is the full list of all 54 Fallen Enchantress: Legendary Heroes achievements.
Create a custom sovereign.
Win by forging an alliance with all players.
Win and have at least 3,000 population.
Win as Magnar.
Defeat a faction.
Play for 20 hours.
Complete 10 quests in a single game.
You've managed to slay Torax!
Make 1000 gildar from selling items in shops.
You defeated a sovereign in battle!
You have captured an enemy city!
Reach level 15 with a champion.
Recruit Gallowman
Play for 10 hours.
Get a city to level 5 in one game.
Control 5 cities in a single game.
Not since Peter MacNicol has one been slain!
Tap 10 resources in a single game.
Buy an item from a shop.
Play for 5 hours.
Design a unit.
Reach level 5 with a champion.
Explore 10 goodie huts in a single game.
Your Fame has lead a hero to your cause.
Complete a quest.
You have defeated an army!
You killed a monster!
All nations start with one.
You've managed to slay Abeix!
You've managed to slay Delin!
You've managed to slay Morian!
You've managed to slay Vetrar!
Awarded for completion of the Legendary Hero scenario.
Win by defeating all of your opponents.
Win by completing the Master Quest.
Win by casting the Spell of Making.
Win by having the highest score by the turn limit.
Win as Altar.
Win as Gilden.
Win as Pariden.
Win as Tarth.
Win as Kraxis.
Win as Resoln.
Win as Yithril.
Play for 40 hours.
Play for 100 hours.
Recruit Mausolos
Recruit Raza the Wild
Recruit Kasst
Recruit Tuatha
Recruit Nen Ratcatcher
Recruit Ascian
Win as Capitar.
Win as Umber.