Keystone Expansion Pufferfish's Skills
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
MMO-style skill tree expansion for Puffish Skills, adding new progression categories like Combat, Mining, Exploration, Farming, Crafting, Building, Magic…
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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
- 9 progression categories:
- Combat
- Mining
- Exploration / Mobility
- Farming
- Crafting / Artisan
- Building / Architecture
- Magic / Alchemy / Enchant
- Taming / Companions
- lumberjack
- 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.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.11, 1.21.10, 1.21.9
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as keystone_expansion_pufferfish_skills.jar — drop this file into the mods folder
- Download size: 65 KB
- Download link checked 2 Oct 2026 — working
These come from our own check of the pack file, not from the source page.