Ordered by installs · Not tested by us
The 20 most-installed Slay the Spire mods (2026)
Ordered by Steam Workshop subscriptions, which is a count from Valve rather than a judgement from us. We have not installed these, and say so rather than implying a verdict we have not earned. Everything here installs by clicking Subscribe.
The short version
- Most installed: ModTheSpire, 2,916,781 subscribers.
- 7 of 20 updated since the start of 2025, which matters more than subscriber count for whether a mod still works.
- All install through Steam. Subscribe on Workshop and the game picks it up on next launch. Nothing to unzip.
All 20, most installed first
toolsAPIUpdated 24 January 2023
APIUpdated 21 August 2025
APIUpdated 21 August 2025
CharacterrelicseventsCardsBossesElitesMonstersModifiersPotionsRoomsNeowExpansioncontentEnglishSimplified ChineseKoreancampaignUpdated 21 April 2026
APIModifiersExpansioncontentUpdated 24 October 2025
qolUtilityEnglishSimplified ChineseKoreanRussianUpdated 17 January 2026
UtilityqolUpdated 5 January 2024
APIEnglishSimplified ChineseUpdated 23 March 2024
UtilityqolEnglishFrenchSimplified ChineseUpdated 21 August 2024
CharacterUpdated 16 January 2020
- 11325,281subscribers
relicsqolEnglishFrenchKoreanJapaneseSpanish - SpainSimplified ChineseTraditional ChineseUpdated 7 February 2026
qolUpdated 31 July 2021
relicseventsCardsBossesElitesMonstersModifiersPotionsRoomsNeowExpansionEnglishKoreanRussianSimplified ChineseUpdated 3 December 2021
qolUpdated 1 December 2020
schinesetchineseenglishCharacterrelicsTouhouUpdated 28 January 2020
UtilityqolUpdated 5 August 2022
englishUtilityqolUpdated 4 January 2019
MultiplayerNeowExpansioncontentEnglishFrenchKoreanSimplified ChineseUpdated 8 October 2022
CharactereventsCardsVtuberrelicsPotionsBossesSimplified ChineseTraditional ChineseEnglishUpdated 15 March 2026
CharacterEnglishFrenchKoreanRussianJapaneseSpanish - SpainSimplified ChineseUpdated 24 January 2021
Subscriber counts and approval scores are Valve's, read on 5 September 2026 and not adjusted by us. Browse the full Workshop.
Common questions
What is the best Slay the Spire mod?
By installs, ModTheSpire, with 2,916,781 Steam Workshop subscribers. That is the most-installed rather than the best: subscriber count measures how many people tried it, not whether they kept it. Workshop's own approval score is shown next to each one where Valve publishes it.
How do I install Slay the Spire mods?
Everything on this page is a Steam Workshop item, so installing means clicking Subscribe on its Workshop page and letting Steam download it the next time you launch the game. There is nothing to unzip and no files to move. Unsubscribing removes it. Mods from outside Workshop work differently and are not covered here.
Are these Slay the Spire mods safe?
They are hosted by Valve and distributed through Steam, which is a meaningfully lower risk than downloading files from elsewhere, but Valve does not audit mod code. We have not run any of them. Treat a mod with a large subscriber count and a recent update as better evidence than one with neither.
How is this list ordered?
By Steam Workshop subscriptions, highest first, read on 5 September 2026. That is a count from Valve, not a judgement from us. We have not ranked these by quality and do not have the basis to: nobody here has installed all 20.
Do you get paid for these?
No. Mod authors are not paid by us and cannot pay for a position here. The order is Valve’s subscriber count and nothing else.