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