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