Slay the Spire 2 Beta Patch Notes - v0.99 (13th March 2026)
Patch Notes Slay the Spire 2

Slay the Spire 2 Beta Patch Notes - v0.99 (13th March 2026)

Nathan Lees
Nathan Lees
· 5 min read

Table of Contents

One week in, and Mega Crit is keeping the cadence going. Slay the Spire 2 v0.99 dropped today, and while it's not a headline feature drop, it's doing the work that matters at this stage of early access: squashing bugs and tightening up the experience.

The headline mechanical change is a new limit on max HP values, which is worth watching if you've been running any HP-stacking builds. Beyond that, the patch brings a round of bug fixes alongside some art additions. Not flashy, but after the softlock issues we saw fixed in v0.98.3, it's clear Mega Crit is treating the bug backlog seriously rather than letting it pile up.

One thing to flag: v0.99 is launching exclusively on the public beta branch first. To access it, right-click Slay the Spire 2 in your Steam Library, then go to Properties and Game Versions. It'll roll to the main branch once stability is confirmed. Smart approach for a game still finding its feet. Full patch notes below.


Hey, Slayers! Happy 1-week-since-launch day! Today's patch mostly contains a lot of bug fixes, but it also contains a few art additions and a new limit to max HP values.

Heads up that this patch will at first be exclusive to the newly released public-beta branch for players who want to try out the newest updates and ensure they're stable before they're pushed to the main branch. You can access it by right-clicking on Slay the Spire 2 in your Steam Library, then clicking Properties > Game Versions & Betas > public-beta.

BALANCE:

  • Players, enemies, and pets can no longer have their HP increased above 999,999,999

ART:

  • Add icon for Murderous run modifier
  • Added portrait art for the following cards:
    • Feeding Frenzy
    • Sloth
    • Waste Away

BUG FIXES:


General:

  • Pressing B on controller while focused on a dropdown menu no longer also closes the settings screen
  • Fixed crash when interacting with potions during combat transitions
  • Fixed crash when syncing cloud saves on Windows
  • Fixed rare save data loss on Windows when power is lost during a save
  • Fixed crash when quickly navigating away from menus
  • Fixed dev console failing to match commands on non-English system locales
  • Fixed potential softlock when auto-played cards trigger grid or card selection
  • Fixed state divergence related to discarding potions too soon after combat ends
  • Fixed being able to "peek" in card screens outside of combat
  • Fixed closing the settings menu while a dropdown is open not also closing the dropdown
  • Fixed navigating down the dropdown items causing the settings to scroll down
  • Fixed softlock when auto-played cards triggered card selection

Ironclad:

  • Fixed Hellraiser power playing Strikes if there are no valid targets

Potions & Relics:

  • Fixed Fairy in a Bottle and Lizard Tail relics not healing you when your Max HP is 1
  • Fixed Massive Scroll relic description saying that it can only give you Colorless multiplayer cards
  • Fixed softlock if you proc Lasting Candy relic from the fixed tutorial card rewards
  • Fixed Hand Drill relic applying Vulnerable to the player if Burn card breaks their block

Enemies:

  • Fixed missing Kaiser Crab boss death VFX
  • Fixed Kaiser Crab face animation not looping after a claw takes damage
  • Fixed the word "Stunned" not appearing when Rock Bowlbug does its stunned move

Ancients:

  • Fixed Tezcatara's Brightest Flame card being able to decrease your Max HP to less than 1

Events:

  • Fixed softlock when dying in the Jungle Maze Adventure event
  • Fixed softlock if you die in the Room Full of Cheese event

Multiplayer:

  • Fixed softlock when any player has Potion Belt and Alchemical Coffer relics
  • Fixed being unable to navigate via controller if you unready yourself in lobby
  • Fixed players being unable to end their turn when they die while the Whispering Earring relic autoplays their cards
  • Fixed Doormaker's Door HP not scaling correctly after the Doormaker escapes
  • Fixed softlock when queueing a potion to be thrown after the enemy would die
  • Fixed crash when returning to the map after loading a multiplayer save
  • Fixed host and client sometimes generating different maps from the same seed
  • Fixed map changing after reconnect with the Big Game Hunter modifier or Treasure Map and Golden Compass relics
  • Fixed softlock caused by a player dying with cards in their hand
  • Fixed state divergence related to playing Huddle Up during another player's card selection
  • Fixed timing-related state divergence occurring at the end of a combat
  • Fixed rare instances of getting stuck at an empty chest

Localization:

  • Fixed crash when selecting Ironclad on Turkish locale systems
  • Fixed Russian card descriptions showing raw template text for Call of the VoidCoolheadedFuel, and Ice Lance cards
  • Fixed an issue when viewing run histories in Russian where the player played as The Defect
  • Fixed an issue with Buffer+ card's description when playing in Portuguese
  • Fixed an issue with Call of the Void card's hovertips when playing in Castilian Spanish
  • Fixed an issue with Colossus card's hovertips when playing in German
  • Fixed an issue with the "Accept" option in The Trial event when playing in French
  • Fixed an issue with the "Violence" option in the Tinker Time event when playing in Korean

LOCALIZATION:

  • Added more translated text for various languages
  • Fixed translation and formatting errors for the following languages:
    • Italian
    • Russian
    • Simplified Chinese
    • Turkish
    • German
    • Spanish
    • Polish
  • Adjusted Japanese font to be rendered slightly smaller and raised to improve vertical centering
  • Improved Korean font spacing
  • Improved Russian and Thai font rendering
  • Improved the look of Simplified Chinese font
  • Share button in stats screen now utilizes correct localized string

MODDING:

  • Reworked mod structure
    • mod_manifest.json has been moved outside of the PCK. All mods should now ship with an additional file named <mod_id>.json - see ModManifest for the new JSON structure.
    • PCK is no longer required for all mods. Json is the only file that is required to declare a mod. The json must declare whether the mod includes a pck/dll file.
    • settings.save now includes a list of all mods that were loaded in the last game run. Reordering this list affects load order.
    • Mods may declare dependencies in the manifest. If settings.save declares a load order incompatible with the listed dependencies, then a re-sort is forced.
    • Added affects_gameplay field to mod manifest. If false, then the mod will not be checked against the host's mods in a multiplayer game.
    • Updated 0Harmony/MonoMod to support mac arm64. Manually overwriting it should no longer be required.

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