
Keystone Expansion Pufferfish's Skills
MMO-style skill tree expansion for Puffish Skills, adding new progression categories like Combat, Mining, Exploration, Farming, Crafting, Building, Magic and Taming.
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About this Mod
Keystone Expansion — MMORPG Skill Trees Addon
Keystone Expansion is an MMORPG-inspired skill tree expansion for Puffish Skills, built to add long-term progression, build variety, and satisfying endgame power to survival modpacks.
This project adds multiple custom categories with large, interconnected trees and meaningful upgrades (health, resistance, stamina, luck, XP gain, mobility, damage, and more). The goal is a “hack & slash / MMO” progression feeling: early upgrades are subtle, but the more you invest, the more your character becomes noticeably stronger.
Main Features
- 8 progression categories:
- Combat
- Mining
- Exploration / Mobility
- Farming
- Crafting / Artisan
- Building / Architecture
- Magic / Alchemy / Enchant
- Taming / Companions
- MMO-style scaling: long-term leveling curves, endgame milestones and keystones
- Synergy-focused trees: multiple paths and playstyles (tank, mobility, sustain, luck/XP, etc.)
- Addon-friendly: made to be used inside modpacks and servers
Required Dependencies
This addon will NOT work without the following required mods installed:
- Puffish Skills (Required)
- Puffish Attributes (Required)
Compatibility
- Designed for Forge / Fabric / NeoForge
- Works as an addon for modpacks / servers using Puffish Skills
Notes
- This project does not replace Puffish Skills — it extends it with additional categories and custom trees.
- Balancing can vary depending on your modpack difficulty and progression speed.
Enjoy the grind — and the dopamine when your build finally pops off.
Available Versions
How to Install Keystone Expansion Pufferfish's Skills 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 (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Keystone Expansion Pufferfish's Skills". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+7 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Keystone Expansion Pufferfish's Skills 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 (1.21.11). You can switch loaders with one click in the panel.
Is Keystone Expansion Pufferfish's Skills compatible with fabric and forge and neoforge?
Keystone Expansion Pufferfish's Skills officially supports fabric, forge, neoforge for Minecraft 1.21.11, 1.21.10, 1.21.9. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Keystone Expansion Pufferfish's Skills – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Keystone Expansion Pufferfish's Skills 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.
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Rent Modded Server
Install Keystone Expansion Pufferfish's Skills with just one click on your server.