Keystone Expansion Pufferfish's Skills

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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fabricforgeneoforgeadventuregame-mechanicslibrary
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Screenshots

Keystone Expansion Pufferfish's Skills Screenshot 1
Keystone Expansion Pufferfish's Skills Screenshot 2
Keystone Expansion Pufferfish's Skills Screenshot 3
Keystone Expansion Pufferfish's Skills Screenshot 4
Keystone Expansion Pufferfish's Skills Screenshot 5
Keystone Expansion Pufferfish's Skills Screenshot 6

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:

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

1.1.9release
MC 1.21.11fabric, forge, neoforge
January 20, 2026
1.1.8release
MC 1.21.10fabric, forge, neoforge
January 20, 2026
1.1.7release
MC 1.21.9fabric, forge, neoforge
January 20, 2026
1.1.6release
MC 1.21.8fabric, forge, neoforge
January 20, 2026
1.1.5release
MC 1.21.7fabric, forge, neoforge
January 20, 2026

How to Install Keystone Expansion Pufferfish's Skills on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

3

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

fabricforgeneoforge

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+7 more)

Server-side

Unsupported

Recommended 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.

Rent Modded Server

Install Keystone Expansion Pufferfish's Skills with just one click on your server.

Recommended RAM
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Min. 3 GB | +1 GB pro 8 Spieler
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Details

License
LicenseRef-All-Rights-Reserved
Server-side
Unsupported

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.1