Mods / Randomization

• TTasty's Additionsby 0TastyPie0Welcome to Tasty's Additions, a content mod which adds new items, playable characters and more! Currently the mod has 50+ new items to discover, 3 new playable characters, 6 new weapon types, 2 new weapon materials (that's a total of 120+ weapons) an23.9k downloadsupdated 1 mo ago
• BBiodiversity Plusby TattersTheBatAdds a bunch of new enemies to the game for a wider catalogue of perilous foes.20.8k downloadsupdated 7 mo ago
• HHarder Zones (1-4)by ChaonAdds new features to enemies to increase the difficulty. Configurable. Requires Harder Zone 5 for Zone 5 changes.20.5k downloadsupdated 11 mo ago
• HHarder Zone 5by ChaonMakes Zone 5 more difficult. Requires Harder Zones (1-4) for changes to the previous 4 zones.19.4k downloadsupdated 11 mo ago
• TTatters' Dungeon Packby TattersTheBatAn experimental item pack that adds a bunch of new items to the game to shake things up.16.2k downloadsupdated 23 mo ago
• TThe Binding of Isaac Item Packby ChaonAdds items, shrines, beggars, and shopkeepers from The Binding of Isaac.12.9k downloadsupdated 11 mo ago
• SSymphony of Sorceryby Ayre223The Symphony of Sorcery fan expansion for Crypt of the Necrodancer adds a whole new zone to the game! With it comes 70 new foes and members of the Court of Chaos, as well as a meeting with the leader of the Court for those that can manage to venture12.5k downloadsupdated 17 mo ago
• TThe Binding of Isaac Boss Packby ChaonAdds bosses from the Binding of Isaac to the pool of zone bosses. Currently contains Loki, Rainmaker, and Clutch. (Requires Binding of Isaac Boss Music mod for their boss themes)10.6k downloadsupdated 11 mo ago
• AAyre's Pack of Stuffby Ayre223Adds a new item slot "amulet" with 11 items, 4 weapon materials, 4 weapon shapes, 3 unique weapons, 6 spells, 2 shields, 1 boots, 7 headgear, 1 shovel, 1 charm, 2 armors, 1 familiar, 1 pack, 1 torch & 2 rings! With Symphony of Sorcery loaded, also ad10.0k downloadsupdated 2 y ago
• UUndead Decorby TattersTheBatFurnishes the crypt with tables, chairs, rusty cages, and more! Also spices up the lobby.9.8k downloadsupdated 17 mo ago
• RRandomise Zonesby ChaonRandomise the order of zones AND tweak the enemy spawns to retain a proper difficulty curve that is balanced and thematic to each zone.7.1k downloadsupdated 11 mo ago
• CChoose Your Final Bossby ChaonPause Menu->Customize->Custom Rules->Mod Options->Choose Your Final Boss. Enjoy!6.6k downloadsupdated 12 mo ago
• EEquipped Enemiesby Priw8Gives random items to enemies! Highly configurable.4.2k downloadsupdated 3 y ago
• MMore Modesby TattersTheBatAdds additional extra modes to mix and match as you see fit.4.0k downloadsupdated 11 mo ago
• GGargoyles Galoreby TattersTheBatAdds 11 new gargoyle variants to decorate and danger-ate the crypt.2.4k downloadsupdated 2 y ago
• AArchipelago Reduxby lastingParadoxUpdated Synchrony integration with Archipelago. Randomize your progression with a custom lobby and acquire items for other players playing alongside you! Note: Online multiplayer is currently in a BETA state! If you find any issues, please report th2.3k downloadsupdated 2 mo ago
• RRecycled Contentby TattersTheBatThis mod aims to re-implement content that has been scrapped or removed from the game throughout its history. It includes reworked formerly-editor-only items, polished unused enemies, and more!1.8k downloadsupdated 2 y ago
• AAllies of the Cryptby 0TastyPie0This is "Allies of the Crypt", a mod that adds new content based around a new item type: "Allies"! These items can summon creatures to fight for you! There are more items available too, that can improve your allies in various ways. In addition to ite1.7k downloadsupdated 17 mo ago
• MMore Foesby 0TastyPie0Welcome to "More Foes", a content mod which introduces a multitude of new foes to the game! They can be found all throughout the game, with the goal of making runs more varied, interesting and a bit more difficult. Training rooms are available for **1.6k downloadsupdated 7 mo ago
• AArrhythmeowby ChekinNoogetCursed by the NecroDancer, your heart is worsening. Can you make it out of the crypt?1.2k downloadsupdated 16 mo ago
• SSong Randomizerby BotTujaRandomizes the current level song. Idea stolen from Ruby.978 downloadsupdated 4 y ago
• MMaxwellby TattersTheBatMaxwell from Scribblenauts joins the ND Roster! Use his notebook to write your wildest dreams to life, granted they're in the form of an in-game entity. Also allows you to add adjectives to your creations to spice them up!901 downloadsupdated 20 mo ago
• SSecure Crypt Protocolby TattersTheBatWarning: Anomalous entities have breached containment at Site C-0-TND. Proceed with extreme caution. This mod adds various items and entities from the SCP Foundation collection. The Foundation has set up various outlets in the Crypt, which will occas698 downloadsupdated 7 mo ago
• AAutoGen Tomesby TattersTheBatAutomatically generates tomes for all spellcasts for optimal absurdity. Happy casting!533 downloadsupdated 2 y ago
• CChat Simulatorby TattersTheBatAdds random simulated chat messages to singleplayer to make things a little less lonely.442 downloadsupdated 4 y ago
• IItem Modifiersby 0TastyPie0Introducing Item Modifiers! Now items you find can have modifiers attached, which change how the item works in some way. Many item types are supported and can be randomly assigned one of 20+ different kinds of modifiers. There's also 2 new game modes305 downloadsupdated 1 mo ago
• SScale Randomizerby BotTujaQuick simple mod, that randomizes the scale of enemies. Idea stolen from Noobette and PS.280 downloadsupdated 4 y ago
• TToo Many Dice Trapsby mrNomkeySpawns in additional dice traps, either anywhere or using normal trap placing logic.270 downloadsupdated 5 mo ago
• CCustom Floor Orderby hiros24hReorder, randomize, or skip the floors.180 downloadsupdated 16 mo ago
• HHeart Failureby TattersTheBatEvery single living entity has a 1/1000 chance to explode and die every turn. Configurable.178 downloadsupdated 18 mo ago
• IItem Fusionby TattersTheBatAllows you to attach objects, items, traps, shrines, and more to your weapons. Many have special effects while fused. Default keybinds are 'Z' for fusing and 'X' for unfusing.155 downloadsupdated 2 y ago
• SSoul Stonesby TattersTheBatAdds TBoI-style Soul Stone consumables for all characters, with effects themed around the respective character's mechanics.85 downloadsupdated 14 mo ago

32 randomization 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.