Full list of all 83 Shotgun King: The Final Checkmate achievements.
The base game contains 23 achievements, and there is 1 DLC pack containing 60 achievements.
Win with Ermine Belt, Kingdom Wealth and Unjust Decree
Win with Royal Loafers, Wand of Wings and Unfaithful Steed
Win with Castle, Kite Shield and Bodyguard
Win with Ritual Dagger, Taunting Hop and Subtle Poison
Win with Ammunition Depot, Elite Gem and Small Fry Harvest
Kill The Red Book
Win with Militia, Assault and Pikemen
Win with Iron Maiden, Genderqueer and King's Mistress
Win with Pillage, Revolution and Conscription
Kill The Black Bishop
Win with Zealots, Ascension and The Red Book
Win with Conclave, Cardinal and Sanctity
Win with Sacred Crown, Majestic Censer and Courteous Jousting
Win with Ruins, Pillage and Kingly Alms
Win with Majestic Censer, Black Mist and Cornered Despot
Win with High Focus, Crow's Blessing and Engraved Scope
Win with Genderqueer, Saboteur and The Secret Heir
Win with The Moat, Wand of Gust and August Presence
Win with Three Extra Barrels
Have 3 Magic Wands
Win with Two Rightful Curtsies and The Moat
Kill The White King
Have 10 black cards
Win with Highest Dungeon, Cathedral, Trowel
Finish throne at rank 15
Finish throne at rank 14
Win with Bloodless Coups, Peace, Philanthropy
Have 20+ ammo
Win with Court of the King, Court of the King, Full Plate Armor
Win with Cavalry, Kite Shield, Courteous Jousting
Win with Guillotine, Cannon Fodder, Small Fry Harvest
Have 5+ queens on the board at one time
Finish throne at rank 13
Finish throne at rank 12
Win with Throne Room, Kingdom Wealth, Castle
Beat Throne mode without killing a queen
Win with Analysis Paralysis, Sacred Crown, Black Mist
Have 6+ rooks on the board at one time
Finish throne at rank 11
Win with Bushido, Caltrops, Taunting Hop
Destroy the last leader and the black king with a grenade
Win with A Piercing Truth, Blunderbuss, Welcome Gift
Win with Royal Loafers, Cornered Despot, Unholy Call
Win with Nightbane, Bushido, Ritual Dagger
Kill the white king by hopping on him
Activating black mist 9 times
Get eaten by the white king
Finish throne at rank 10
Kill the white king by throwing his heir at him
Make a rook save the king from a flying piece
Have 2 knights, 2 rooks, 2 bishops, 1 queen, 1 king, and 8 pawns on the enemy field
Finish throne at rank 9
Finish throne at rank 8
Finish throne at rank 7
Finish throne at rank 6
Beat Throne mode without using a folly shield
Win with Cavalry, Lookout Tower, Conclave
Get killed by your own grenade
Beat Throne mode in less than 2 minutes
Beat Throne mode in less than 5 minutes
Finish throne at rank 5
Finish throne at rank 4
Grab the queen and carry her to the square you start the round on
Kill an Iron Queen
Finish throne at rank 3
Have more ammo in your clip than in your max reserves
Beat throne mode with this shotgun
Push a piece out of the moat
Beat Throne mode without letting a pawn promote
Finish a floor by turn 6
Have a firepower equal to 1
Finish throne at rank 2
Finish a floor moving only with souls
Finish a floor without moving to a white tile
Finish throne at rank 1
Be threatened by 4 pieces at once
Have an arc of 120 or higher
Finish a floor without killing any non-leader piece
Finish a floor without killing any pawn