Here is the full list of all 50 Armello achievements.
As the Prestige Leader, attack the King.
Have the Spy Glass and Sailor's Lantern Equipped at the same time.
Win a game with Thane of the Wolf Clan.
Win a game of Armello without killing another Hero.
Win a game with a Spirit Stone Victory.
Be presented with a mystical choice.
Win a game with a Prestige Victory
Win a game with a Prestige Victory on the 9th Day or later.
Be tricked and trapped by some troublesome lil' fellows.
Win a game with Zosha of the Rat Clan.
Win a game with a Kingslayer Victory.
Complete Armello's Prologue.
Win a game with Sana of the Bear Clan.
Win a game with River of the Wolf Clan.
Win a game with Brun of the Bear Clan.
Win a game with Barnaby of the Rabbit Clan.
Win a game of Armello without dying.
Kill the same Hero 5 times in a single game.
Kill another Hero in Battle with nothing Equipped and no Followers.
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.
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.
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.
Steal another Hero's last Gold using Mercurio's Hero power.
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 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.
Steal the King's Crown in Battle with the Mirror Cape.
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.
Defeat four or more Kings Guard's in a single 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.