Shotgun King: The Final Checkmate

Your ammunition within your chamber and your reserves both count towards this achievement. To make this as easy as possible on yourself and require less cards, start on Throne Rank 1 and use the Richard III shotgun which starts at 11 shells.

To unlock the Richard III, you need 4+ shotgun shell capacity in any gun prior to this run (4 shells in chamber). Using the starting gun, Solomon, and getting two "Extra Barrel" cards will achieve this.

During your run, be on the lookout for the black cards that increase your ammo reserves.

Cards such as:

• Elite Gem

• Ermine Belt

• Extra Barrel

• Force Feeding

• Kingdom Wealth

• Majestic Censer

• Rightful Curtsy

• Small Fry Harvest

I unlocked this achievement by using the Richard III and getting the Ermine Belt, Kingdom Wealth and Extra Barrel. If you do not get at least the Ermine Belt or Kingdom Wealth by floor 4 or 5, I'd recommend restarting unless you were lucky to get multiple of the other helpful cards.

Also, since you will most likely be going for Kingdom Wealth and Ermine Belt, try to go for the Trigger Happy achievement as well. You simply need the Unjust Decree card beyond these two cards. Make sure you do not pick up Engraved Scope, Kingly Alms, or Royal Loafers however. You cannot get Unjust Decree to spawn if you hold one of these three cards.