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