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