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