Contention Games has launched a Kickstarter campaign for a new expansion of the Slay the Spire board game, titled Downfall, which is inspired by a popular user-created mod. The expansion allows players to play as villains like the Slime Boss, Hexaghost, and Guardian, each with unique player boards, cards, and miniatures. The Kickstarter offers various backing options, starting with the Downfall expansion at a base price, a collector's edition for , and a bundled option with the base game for . The campaign will run until April 8th, and the base game has been available in stores since its release.