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