Here is the full list of all 50 Armello achievements.
Be presented with a mystical choice.
Win a game with Sana of the Bear Clan.
Kill another Hero in Battle with nothing Equipped and no Followers.
Win a game with Brun of the Bear Clan.
Win a game with a Kingslayer Victory.
As the Prestige Leader, attack the King.
Defeat four or more Kings Guard's in a single game.
Win a game with Zosha of the Rat Clan.
Win a game of Armello without killing another Hero.
Win a game with Mercurio of the Rat Clan.
Win a game with a Rot Victory.
Kill the King in Battle, without taking any Wounds.
Steal the King's Crown in Battle with the Mirror Cape.
Steal another Hero's last Gold using Mercurio's Hero power.
Win a game with Thane of the Wolf Clan.
Win a game with a Prestige Victory on the 9th Day or later.
Win a game with a Prestige Victory
Be tricked and trapped by some troublesome lil' fellows.
Win a game with Barnaby of the Rabbit Clan.
Win a game with a Spirit Stone Victory.
Win a game of Armello without dying.
Complete Armello's Prologue.
Win a game with River of the Wolf Clan.
Kill the same Hero 5 times in a single game.
In a single game, receive more than ten Gold from Exploring Dungeons.
Play Reprieve on yourself the same turn you receive a Bounty.
Win a game with Amber of the Rabbit Clan.
Pierce through 3 Shields with Thane's Hero Power.
Defeat a Corrupted Hero with Sana's Hero Power.
As Amber, have 3 Equipped Treasures and 3 Recruited Followers.
Annihilate another Hero with Brun's Hero power active.
Make 3 Kills in one Turn using River's Hero power.
As Barnaby, have three Items Equipped and have a full Hand of Item Cards.
Finish a game with Zosha having never been revealed at Night.
Have the Spy Glass and Sailor's Lantern Equipped at the same time.
Have your Items grant you six or more Shields in Battle.
Kill 3 King's Guards with a Royal Pardon Equipped.
Find and Equip three Treasures from Dungeons.
Heal a Bane.
Play Lightning Strike to a Hero standing on a Palace Tile.
In a single game, find two Portals by Exploring Dungeons.
In one turn, Kill a Hero with whom you currently have an Allies' Pact and take one of their Settlements.
Overcome ten Perils in a single game.
In a game, go from being Corrupt to having 0 Rot.
Breach the Palace before the 5th Dawn.
Reach 13 Rot or more in a single game.
Regain a Recruited Follower to your Party whom you had already lost that game.
Be tempted beyond restraint in a Forest.
Be saved by a very helpful fellow, just when you need him most.
Become King or Queen of Armello 50 times.