
King of Fools Overhaul
King of Fools Overhaul is an early‑alpha Fabric mod that adds a growing set of classic‑tech progression features, starting with tin, raw tin, and their blocks. The long‑term goal is to slowly rebuild that classic Tekkit feel one update at a time. V0.00.06
Screenshots






About this Mod
What the project does:
King of Fools Overhaul is a Fabric mod for Minecraft 1.21.5 that adds new blocks, items, and quality-of-life features. Currently, it introduces tin ore (with deepslate variant), marble and its building blocks, vein mining, tree feller, and improved leaf decay. All new ores and blocks are fully integrated with crafting, smelting, and loot tables. Nothing has been removed from vanilla; only additions and improvements. In future updates, the mod will begin to seriously overhaul game progression—including reworking ore systems (such as exploding nether ore), tech trees (as an uncertain example), and more.
Why download:
This mod is for testers and early adopters who want to help shape a new tech/progression mod inspired by classic Tekkit. The goal is to slowly build a 1.21.5 “Tekkit-like” experience, with feedback and feature requests welcome. As development continues, expect major changes to progression, balance, and gameplay. If you want to see new features, test early builds, or suggest ideas, this project is for you.
Critical information:
- Requires Minecraft 1.21.5, Fabric Loader 0.16.9, and Fabric API 0.119.5+1.21.5
- Only adds new content for now; vanilla gameplay is untouched, but will be overhauled in future updates
- Early alpha: expect frequent updates, balance changes, and evolving gameplay
- All feedback and bug reports are appreciated
Available Versions
How to Install King of Fools Overhaul on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.5).
Install Mod
Open the mod browser in the dashboard and search for "King of Fools Overhaul". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.5
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
King of Fools Overhaul server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.5). You can switch loaders with one click in the panel.
Is King of Fools Overhaul compatible with fabric?
King of Fools Overhaul officially supports fabric for Minecraft 1.21.5. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with King of Fools Overhaul – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if King of Fools Overhaul consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install King of Fools Overhaul with just one click on your server.