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