Mods / Bosses

• DDownfall Expansion Mod - 6.0by Michael MayhemDownfall is a full-featured Expansion for Slay the Spire, including a new campaign, NINE new heroes to play, new relics, new cards, new potions, and more. The Heart demands that this endless cycle of slaughter be finished. Answer the call as a Villain, and see to the defense of the Spire. Integra...1.1M downloadsupdated 6 mo ago
• RReplay the Spireby The_Evil_PickleNote: This mod is no longer being updated. It's been far too long now, and I need to move on. This mod adds: * 60+ Relics (4 ironclad, 4 silent, 6 defect, 1 watcher, 50+ shared) * 70+ Cards (15 ironclad, 15 silent, 15 defect, 11 watcher, 15 colorless, 15 curses) * 5 Events * 11 Potions * 2 Rooms...416.9k downloadsupdated 5 y ago
• SShionby 76561198834669480Translation ready for all new characters!! Click the link below to remove the chibi Shion above the artwork. New characters: Shion, Wangchuan, Liyezhu, Eislu Ren and Kuroisu. Shion has her own custom voice. Their all have unique special costumes! This mod introduces 7 new characters, 94 new relic...304.0k downloadsupdated 2 d ago
• LLibrary of Ruinaby Call of FleetThis mod is based of Library of Ruina. This mod is in the beta phase, may have many issues. If you meet any issue, please send your feedback towards me, thank you! If you have any ideas or suggestions, you're welcome to provide them. This mod contains: New character, cards, relics, enemies. And s...265.8k downloadsupdated 2 y ago
• LLobotomyby Call of FleetThis mod is based of Lobotomy Corporation. This brings you a new special experience (lol). Please try not to feel discouraged if you die too many times at the beginning, because everything is going to be alright! Once you understand this mod enough, we believe you will be handy in this. This mod...207.1k downloadsupdated 5 y ago
• AArknightsby 76561198389809126The famous character of the mobile game Arknights, W climbs up the spire. W uses a mechanism that enhances card effects consuming SP. The card consumes a certain amount of SP and activates its powerful capabilities. W has eight classes with different abilities. Each class has the following charac...184.3k downloadsupdated 5 y ago
• RRuinaby DarkgladeAdds a brand-new Act 1, 2, 3, 4, and 5 inspired by Library of Ruina. Dive into a sprawling, mysterious library where the monsters inside the books are very much alive. Fight through these horrid creatures, recount the memories of those that have fallen before you, and reap the spoils that only a...167.5k downloadsupdated 10 mo ago
• LLibrary of Ruina Extraby Call of FleetThis mod is an expansion to Library of Ruina Mod. But this mod could run without Library of Ruina mod. Library of Ruina mod: This mod contains: 1. Boss fight (need to use original map to encounter) 2. Special challenge event. 3. Events (need to use original map to encounter) If you run this mod w...155.5k downloadsupdated 2 y ago
• GGensokyoby DarkgladeAdds a brand-new Act 1, 2, and 3 inspired by Touhou Project. Venture into the wondrous land of illusions and encounter its various denizens. Some of them may be friends, some of them may be foes, but all of them are sure to leave a memorable impression. Act 1 Features: 3 bosses 3 elites 13 hallwa...142.3k downloadsupdated 3 y ago
• TThe Animatorby EYBMod based on anime characters which currently contains 1 new Act, 1 new class, 170+ new cards (13 main anime series), 26 new relics, 15 new enemies, 6 new events. Discord server, for future updates, previews and general feedback. The mod is still in progress and I will add more cards, relics and...141.0k downloadsupdated 5 y ago
• SShadowverse The Spireby FangSlay the Spire 2 SVWB MOD: This mod adds Forestcraft, Swordcraft, Runecraft, Shadowcraft, Bloodcraft, Havencraft, Dragoncraft and Portalcraft from the Shadowverse CCG to the Spire! The card pool contains cards from the Basic and Classic sets up until the newest expansion, "Hero Of Shadowverse." E...136.5k downloadsupdated 19 mo ago
• IInfinite Spireby Blank The EvilPrimarily this mod is an expansion mod that adds lots of new content, like new relics, cards, events, bosses. One of the other goals of this mod was to integrate it with as many mods as possible. This mod also allows the player to keep climbing after the 3rd floor even on normal runs. After you h...123.4k downloadsupdated 6 y ago
• HHubrisby Bug KiooehtA general content expansion mod for Slay the Spire. Currently adds: 50+ Relics 20+ Cards 6 Events 2 Bosses 2 Custom run modifiers Includes crossover content with the following mods, play with them as well: Infinite Spire The Construct The Mystic Mimic Mod120.8k downloadsupdated 4 y ago
• AActs of Hallownestby VenIMThe Acts of Hallownest 3 New Acts Inspired by the amazing world of Hollow Knight. Hollow Knight and Associated Characters, Art, Story and Sounds property of Team Cherry. I don't claim rights to anything except my love for both Slay the Spire and Hollow Knight. If you haven't played the original H...112.5k downloadsupdated 6 y ago
• SSousou no Frierenby 76561199018223486Please don't install Slay the Spire in disk C, it may crash!!! Mod Introduction The mod, based on the anime Sousou no Frieren or Frieren: Beyond Journey's End, now adds 2 new characters Frieren,Fern 100+ character cards, 36 Magic items, 17 character relics, 3 potions, 4 events, 1 new boss in act...105.2k downloadsupdated 5 mo ago
• TThe Jungleby Bug KiooehtPresenting the first of it's kind - an entirely new Act! Embark on an epic journey after completing the Exordium, to a dangerous and wild Jungle just outside of the Spire's City. Encounter fearsome tribal dwellers, challenging wildlife, and an entire full set of Bosses unique to the Jungle. The J...90.2k downloadsupdated 7 y ago
• SSpire Biomesby (Gk) EraselsIntroduction: For the sixth year in a row, I'm glad to present another anniversary project! The date is 2024/01/18 and that means it's been six years since Kiooeht gave us the power to do whatever we want to the spire via Mod the Spire. Once again, a whole bunch of people came together to make an...89.7k downloadsupdated 1 mo ago
• HHonkai: Star Rail Modby 76561199157402065A mod themed after the game Honkai: Star Rail. It includes 1 new character (Stelle), 200 cards, 100+ relics and 30+ events. == Trailblaze · Core Mechanics == Dealing damage reduces the enemy's toughness, and breaking the toughness to 0 can break the enemy. When breaks, different effects are trigg...71.4k downloadsupdated 5 mo ago
• CConspireby twanvlExpansion mod that adds several new monsters, elites and bosses to the game, as well as new cards for the 3 standard classes, and new relics. Currently adds: * 5 monsters, all fully animated * 2 bosses * 3 events * 18 cards * 17 relics * 2 potions69.1k downloadsupdated 7 y ago
• PPokemon Regionsby DarkgladeAdds a set of brand-new acts inspired by Pokemon. Go on your very own Pokemon journey in the Spire - encounter many marvelous creatures, defeat them, and catch them to fight by your side! Act 1 (Kanto): 3 bosses 3 elites 12 hallway fights 12 events New cards and relics Act 2 (Johto): 3 bosses 3 e...64.8k downloadsupdated 12 mo ago
• BBanG Dream! It's MyGO!!!!!by GigThe Eng translation version has beenfixed. Welcome to contact me for help with various translations and proofreading for the game One day, Chihaya Aine woke up at the foot of the Spire... MOD Introduction: Introducing a new character, Chihaya Aine, with over 70 unique cards, several new events, a...58.4k downloadsupdated 20 mo ago
• KKomeijiModby Call of FleetHi guys, I'm hoykj. My English is not good enough, so if you see anything not good enough or not suitable in this description or mod, tell me please. I mad this mod for interest's sake. Since my ability is limited, this mod may not be really satisfactory, please understanding, thank you. This mod...52.5k downloadsupdated 3 y ago
• 天天命人TheDestinedOneby 76561199252701750This mod is created based on Black Myth: Wukong,add a new character: the Destined One The English translation was assisted by AI. If you find any errors, please feel free to point them out. New Additions 75 cards, 2 potions, 10 derived cards, 7 relics, and a final boss, Erlang. You can challenge...49.2k downloadsupdated 11 mo ago
• BBlueArchive + Hoshino Modby joy1999BlueArchive Mod This is STS fan mode of the mobile game Blue Archive. The translation may be awkward because my native language is not English. If there is anything strange about the translation, please write it and we will improve it. github link <IMPORTANT> If you want, you can set only the bos...47.4k downloadsupdated 3 y ago
• BBundleCore - Trials of the Slayers Pt 2by SandTagFramework Extension used to facilitate crossover relics and mod config options. All bundles use this mod. You may use this mods features to make your own mods, but remember to include it as a dependency both in the MTS file and on steam. Supported mods include things like Downfall and Packmaster....46.2k downloadsupdated 15 mo ago
• GGakuen IdolMasterby 76561198972644585在尖塔也要闪耀登场。 MOD简介 搬运自偶像养成类手游「学園アイドルマスター」。 添加了原作开服至今的所有角色及其换皮，每位角色拥有各自的专属卡牌和专属遗物，在尽量还原原作机制的基础之上进行了尖塔化的调整，并添加少量自设卡牌使流派体系完整。 共3种职业，11位角色，15位Boss。 MOD特色 ·训练时间：训练时间存在期间，小偶像获得特殊加成。每次出牌或结束回合时训练时间将下降，在训练时间内击败敌人可以获得大量三维加成。 ·三维：在Boss战中为你提供额外的伤害加成，影响部分育成事件。 ·偶像之路：独立地图。可与其他拥有独立卡组的小偶像战斗，争夺闪耀。 ·特殊指导：在Boss前的火堆，可...45.3k downloadsupdated 12 mo ago
• CCthughaby 76561199090896653Add Cthugha as a playable Fire Attribute character. CTHUGHA, The Living Flame Great Old One worshipped by the Fire Vampire as the Lord of Fire. The eternal fire can burn all, and the realm follows the heart to control the candle to erode death. It contains: 🎴 75+ new cards; 🎁 10+ new relics; 🧪 3...42.3k downloadsupdated 2 mo ago
• TThe Immortal 藤原妹红by 76561198417412529Slay the Spire 2 Workshop is now out! The Immortal STS2 A mod featuring Fujiwara no Mokou from Touhou Project. Added: - 75+ new cards - 26 new relics - 4 new potions - 5 new events - 1 new Act 4 Boss - 3 new game modes (at the top of character selection screen) Main Mechanics - Being the immortal...38.9k downloadsupdated 18 mo ago
• YYuzusoft!by 76561199095683772Ciallo！ It is my first mod and it is about the galgames of Yuzusoft.The translation is made by me and so there are some defects.The mod has some cardpacks(now there are only 2 and I will bring more) and I hope you can enjoy it. The Content： >>>119+ cards. >>>13 Skins with different start effect....38.4k downloadsupdated 1 mo ago
• BBundle Of Food - High in Calories!by SandTagThese edibles aint shi- Featuring 50+ food related items this big relic pack aims to add bite to your game with flavourful additions. Contains: > 6+ Common relics > 6+ Uncommon relics > 13+ Rare relics > 12+ Boss relics > 1 Event relic (Its a surprise!) There is now a second bundle, Bundle Of Pot...37.8k downloadsupdated 16 mo ago
• RRing Of Destiny(WIP)by Expendable DiverSorry, there is no English version yet. We will add English in a future version. Ring Of Destiny is a full mod with 5 new character and their cards ,relic and alterative skins. Also will have full 4 act and a special boss fight.36.8k downloadsupdated 17 mo ago
• CCleverBossby 76561198844140315①加强第三关boss，让boss血量额外附加（进阶等级的平方）倍，进阶10以后固定百倍血量。 ②进阶10以后，第三关boss行动改变。 ③和RumiaBox联动，持有挑战书时改变倏忽魔。 ④进阶9以上略微加强第二关boss。 ⑤极大的加强了咔咔（ ⑥替换了官方在boss关卡的bgm ENGLISH： ①AwakenedOne、Deca&Donu、TimeEater，Maxhp=ascensionLevel*ascensionLevel*Maxhp，if ascensionLevel >9，Maxhp=100*Maxhp. ②if ascensionLevel > 9，AwakenedOn...27.0k downloadsupdated 5 y ago
• CContingencyContactby 76561198984454884In order to fight against the invincible spire,You leave countless information for yourself in the samsara of death, through which you can find the only way to defeat this tower. By choosing a contract to improve or reduce the difficulty of the game, it will be regarded as a successful challenge...26.4k downloadsupdated 5 y ago
• CChallenge The Spireby aldriedgerBoss Rush, Elite Rush, & More!! Challenge The Spire adds a variety of challenge modes to Slay The Spire. 4 difficulties available for each challenge (Bronze, Silver, Gold, Platinum)! The roadmap for features coming soon (like infinite support, and more challenges) can be found here . Watcher Supp...25.6k downloadsupdated 7 y ago
• BBattle Towersby (Gk) EraselsIntroduction: It is this time of year again, the fourth year since Kiooeht blessed the modding scene with Mod the Spire. That's right, 18/01/2022 marked the fourth year of modding the spire, so a lot of the members of the modding discord came together and made something for everybody to enjoy. De...24.8k downloadsupdated 12 mo ago
• SSlay The Terrariaby TNoNameIt was completed together with 1.4.5. Slay the Spire ✖ Terraria A game featuring a character with thick armor, using a lot of consumables, being able to switch between different states (weapons), and a blue character. All enemies and events on the first to fourth floors were replaced, and special...24.8k downloadsupdated 17 d ago
• SSami Rougeby FimmlpSThis MOD is adapted from Expeditioner's Joklumarkar ! ! ! Please subscribe the PreMOD-TreeHoleMod ! ! ! Q: Why we divide our Mod into 2 MODs which includes the TreeHoleMod ? A: Because we want to provide a solution for the compatibility issue of the coming MODs which may be related to TreeHoleMod...24.4k downloadsupdated 8 mo ago
• 【【Arknights】Mizuki And The Spire Modby MC_manipulatorMizuki, who was supposed to go to Iberia, was brought to the Spire by a mysterious force...... New Content Adds 1 new character: Mizuki Adds 52 + 35 new cards, including 4 basic, 15 common, 20 uncommon, 12 rare and so on Adds 6 bosses and 25 different monsters Adds 30 adaptation events based on A...23.0k downloadsupdated 20 mo ago
• BBundle Of Potions - Free Beer Updateby SandTagWould you like a drink? Bundle of potions is a huge potion expansion mod with 54 unique potions and 15 crossover potions! > 19 common potions > 18 uncommon potions > 16 rare potions > 1 secret potion > 5 common crossover potions > 5 uncommon crossover potions > 5 rare crossover potions Want some...21.3k downloadsupdated 16 mo ago
• CCorrupt the Spireby modargoEncounter corrupted rooms throughout the Spire that provide new challenges, gain powerful corrupted cards and corrupted relics, and see how the double-edged sword of corruption empowers both you and your foes. Make bargains with alien forces, see beyond the Spire, and wield the power you obtain a...21.1k downloadsupdated 2 y ago
• BBundle Of Terra - Polished Update 2by SandTagA terraria themed bundle with a mix of relics and potions! The Bundle of Terra adds lots of the content from Terraria to the spire, with 15 new potions, 15 relics, new types of orbs and as always, fun crossover content with previous bundles! The new potions even come with their own bottle images!...20.7k downloadsupdated 15 mo ago
• PPale of the Ancientsby RazThis is an act 4 containing my attempt to conclude the story of the spire by giving it an alternate final boss and ending. It is accessed via an event that pops up after defeating the act 3 boss (keys not required). The act itself contains 5 adapted basegame encounters (with very big twists), as...19.0k downloadsupdated 3 y ago
• SSumimiDecaDonuby 76561199010921149把第三章boss甜圈八体替换成sumimi的三角初华和纯田真奈 （目前只替换了图片和音乐，后续还会添加初华和真奈的攻击、受击和死亡动画）18.7k downloadsupdated 21 mo ago
• HHifuu Club: Renko & Merryby 76561198333104265In a boundary that no detector could detect, Renko and Merry discovered the entrance to the Spire, thus began a long climb with a mysterious Arcana deck found in unknown space. Usami Renko and Maribel Hearn from Touhou project appear in the Spire. On the long journey, will they advance and retrea...15.4k downloadsupdated 18 mo ago
• EElden Ringby OLendari0Mod based on the elden ring game! Apart from the fact that it's my first mod, it's in a very new phase of development, so maybe it's possible to find wrong texts, bugs, crashes, and many other problems. This version is not even close to the version I want to release in the future, but it's a vers...14.7k downloadsupdated 3 y ago
• TThe Abyssby modargoThe Abyss is an alternate act 3 (and 4!) themed around horrors and aberrations. Once where eldritch and primeval beings were sealed away, the Abyss is now at the heart of their reawakening. And beyond the Abyss is found the Void, where adventurers will face the ultimate test. Together with the Me...14.5k downloadsupdated 4 y ago
• TThe Elementariumby modargoThe Elementarium is an alternate Act 2 themed around elementals and golems. Once the center of a thriving civilization that created many magical wonders, the Elementarium now holds only ruins. Together with the Menagerie (act 1) and the Abyss (acts 3 and 4), it is part of a full set of alternate...13.7k downloadsupdated 4 y ago
• WWandering Minibossesby (Gk) EraselsIntroduction: Hello and welcome to the second modding anniversary project! That's right, 18/01/2020 marked the second year of modding the spire, so a few members of the modding discord came together and made something. Description: Wandering minibosses is a content mod that adds, as the title may...13.5k downloadsupdated 3 y ago

90 bosses mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.