Slay the Spire 2 Second Major Update Removes Door Maker, Adds Eternal Hourglass
The swift RNG overhaul, prompted by an external mathematician's analysis, shows Mega Crit treating early access as a genuine feedback loop rather than a marketing phase, and the Door Maker removal signals a willingness to cut content that does not meet design goals even late in development.
Key Facts
- Mega Crit released the second major update for Slay the Spire 2 on June 19, 2026, removing the Act 3 boss Door Maker and replacing it with Eternal Hourglass.
- The random number generator overhaul was implemented unusually fast, skipping the usual beta testing cycle, after Tockman's analysis.
- Steam Workshop support is now live, allowing players to browse and install mods directly in the game.
- A monster encyclopedia feature has been added, letting players view encountered monsters and their animations, with plans to expand it to include stats and lore.
Reporting from 3 sources: 4Gamer.net, Automaton, Game Spark.
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 the second major update for Slay the Spire 2 on June 19, 2026, consolidating four previous beta patches into one. The update is version 0.107.1 for the main branch.
The new Act 3 boss Eternal Hourglass has an ability that adds an unplayable "Decay" card to the player's hand every time they play a certain number of non-status cards. The boss underwent multiple balance adjustments during the beta period before appearing in this patch. Other enemies like Parasitic Prism and Swarming Mass were also reworked.
The random number generator overhaul came after mathematician Andy Tockman, who holds a bachelor's in mathematics and computer science from MIT and a master's in computer science, published a technical report on June 15 titled "Correlated randomness in Slay the Spire 2." Tockman identified that the game uses "Correlated RNG," where the output of one random number generator provides information about another. For example, on the Underground Waterways path, the Defect's Lightning Orb has a 75% chance of hitting the left enemy in the first battle. By observing past random results, players could predict orb attack direction with over 95% accuracy against Slimers. Tockman also found that the card "Rebound" had a 0% chance of appearing from the Junk Heap event, making it unobtainable outside multiplayer. Mega Crit thanked Tockman in the patch notes, saying "your suffering is now truly random!"
Other additions include three new badges based on multiplayer contributions, UI improvements like detailed error notifications and better controller support, and multilingual translation fixes including Japanese. The game is available in early access on Windows, Mac, and Linux via Steam.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.