Slay the Spire 2 is in early access on Steam, with active beta and main branches receiving frequent balance patches. The most recent update, v0.108.0, was released on July 3, 2026.
Mega Crit has been running Slay the Spire 2 as a live early-access project, shipping patches that respond directly to player and analyst feedback. The second major update, released on June 19, 2026, removed the controversial Act 3 boss Door Maker and replaced it with Eternal Hourglass, a new boss that has since been further refined in beta patches. The same update also overhauled the random number generator after mathematician Andy Tockman published a report on June 15 showing significant bias in random events, such as the Curse card from Neow's Bone relic having a 73.74% chance of being Anguish on one path and a 0% chance of Debt on another. The fix was implemented unusually fast, skipping the usual beta testing cycle.
Steam Workshop support went live with that update, letting players browse and install mods directly in the game. A monster encyclopedia feature was also added, with plans to expand it to include stats and lore. The beta branch has continued to receive targeted balance patches. Beta patch v0.107.0, released on June 5, further adjusted Eternal Hourglass by removing its Decay debuff and altering block gain timing, while also strengthening the early-game Squirming Swarm enemy at higher ascensions. The most recent beta patch, v0.108.0, released on July 3, nerfs Defect's Compression and Ironclad's Crimson Garment, reworks Silent's Infectious Explosion, and buffs Necrobinder's Soul Storm. The Act 3 boss Eternal Hourglass also received new animations.
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Mega Crit released update v0.108.0 for the Slay the Spire 2 beta branch on July 3. The patch nerfs Defect's Compression and Ironclad's Crimson Garment, reworks Silent's Infectious Explosion, and buffs Necrobinder's Soul Storm. The Act 3 boss Eternal Hourglass also received animations.
Mega Crit released the second major update for Slay the Spire 2 on June 19, 2026, bringing the beta branch changes to the main branch. The update removes the controversial Act 3 boss Door Maker, replacing it with a new boss called Eternal Hourglass. The development team said Door Maker forced interesting decisions but exceeded their complexity threshold and had unresolved issues. Steam Workshop support is now live, allowing players to browse and install mods directly in the game. A monster encyclopedia feature has also been added, letting players view encountered monsters and their animations, with plans to expand it to include stats and lore. The update overhauls the random number generator after mathematician Andy Tockman published a report on June 15 showing significant bias in random events. For example, the Curse card from Neow's Bone relic had a 73.74% chance of being Anguish on one path and a 0% chance of Debt on another. The RNG fix was implemented unusually fast, skipping the usual beta testing cycle. The patch also includes new relics, badges, character balance adjustments, and UI improvements.
Mega Crit released beta patch v0.107.0 for Slay the Spire 2, further adjusting the new Eternal Hourglass boss by removing its Decay debuff and altering block gain timing. The early-game Squirming Swarm enemy was strengthened at higher ascensions. Various cards and relics were buffed, and stability improvements were made, including replacing black-screen errors with pop-ups.