Slay the Spire 2: new boss Aeonglass and Steam Workshop support

Briefly

• The second major update for Slay the Spire 2 was released on June 18, 2026.
• The Act 3 boss Doormaker has been replaced by the new boss Aeonglass.
• Steam Workshop support has been added, letting players download mods directly through the Steam client.

The recent update for Slay the Spire 2, released by Mega Crit, marks an important step for the game. With the introduction of the new boss Aeonglass, replacing Doormaker, players now face a fresh challenge in Act 3. This is not just a gameplay change, but also an opportunity for players to adjust their strategies to the new dynamic this boss brings.

GAME-scanner analysis

The addition of Steam Workshop support is a game-changer for Slay the Spire 2. Players can now easily download and install mods, which could significantly extend the game’s lifespan. With 420 mods available at the time of writing, there’s a wealth of options for customization and improvements. This could also strengthen community support, as players share their creations and help each other overcome Aeonglass.

What does this mean for players?

For players, Aeonglass means preparing for a new strategy. Community feedback suggests this boss can be challenging, which may bring both frustration and excitement. The ability to use mods can help players tailor their experience and find new ways to defeat this boss. It may also lead to greater engagement with the game as players share their experiences and strategies.