Compatibility
Minecraft: Java Edition
Platforms
Supported environments
Creators
Details
🧪 Sulfur Slimes: Caverns & Nuclear Chaos (Forge 1.20.1)
Looking for new mobs, custom weapons, and a unique biome mod for your survival world? Don't let their cute faces fool you! Sulfur Slimes introduces an explosive biome expansion for Minecraft 1.20.1 packed with natural hazards, reactive subterranean mobs, and a destructive endgame explosive system—including fully functional Nuclear Bombs!
Welcome to the toxic depths of Minecraft.
🚀 Key Features
- 🌋 The Sulfur Caverns (New Biome Mod): Explore a brand-new underground cave biome lined with unique block formations, hazardous environments, and the natural habitat of custom slime species.
- ⚽ Slime Physics & Combat Mechanics: Interact with the new mobs using fully customized physics. Hitting a normal-sized slime launches it forward like a pinball! If it impacts another entity while flying, it deals heavy damage.
- ☢️ Weaponized Slimes, TNT & Nukes: Mine radioactive materials to craft devastating Nuclear Bombs and explosives. For the ultimate chaotic attack, you can manually stuff TNT or a straight-up Nuke inside a live slime and launch it toward your enemies!
- 💎 Survival Resource Loop: Collect Sulfur and Cinnabar via mining world ores, scavenging the caverns, or harvesting items directly from defeated mobs.
🧼 Slime Ecology & New Mobs
Encounter two distinct, reactive mob species roaming the toxic depths of the world:
- 🟡 Sulfur Slimes: Bright yellow, peaceful critters that thrive near chemical deposits.
- 🔴 Cinnabar Slimes: A volatile red variation found deep within the cavern ecosystem.
- 🔄 Life Cycle & Splitting: Upon death, adult slimes split into two helpless baby slimes. These babies are completely harmless and will naturally grow back into large adults over time if left alone.
☣️ Cave Hazards, Blocks & Ores
Surviving this subterranean adventure requires extreme caution due to these atmospheric threats:
- ☢️ Potent Sulfur Blocks: A rare and dangerous block formation. Approaching it immediately inflicts trespassers with heavy Poison, Nausea, and Blindness.
- 💨 Geysers & Dripstone: Watch your step around pressurized sulfur geysers and toxic dripstone formations hanging from the cavern ceilings.
- ⛏️ Sulfur & Cinnabar Ore: Core crafting components utilized to forge specialized utility items and the mod's signature high-tier nuclear weaponry.
💡 Fun Fact / Dev Lore
⏱️ The 1-Hour Challenge: This project originally started as a backport of the official Minecraft 26.2 update. However, the entire baseline content was fully coded and implemented in under a single hour before expanding into the massive cavern and nuclear mod it is today!
⚙️ Compatibility & Requirements
- Minecraft Version: 1.20.1 (Strictly Optimized)
- Supported Loaders: Forge Only
- Recommended Addons: Perfect for mobpacks, technical survival, and players looking for vanilla+ dungeon expansions.
If you enjoy this project, make sure to check out my other Forge mods: [Thorm's Bosses] and [Slime Rancher]!


