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