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