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