Keystone Expansion Pufferfish's Skills
ModAdds skill trees for combat, mining, farming, crafting, and more.
- Security
- Passed
- Privacy
- None found
- Runs on
- Varies by version
- Loaders
- Fabric, Forge, NeoForge
- Minecraft versions
- Up to 1.21.11
Why gradeD
How grades workStrengths
Points lost
- No release in 9 months−8 points
- No source code link−7 points
- First release only 10 months ago−6 points
- Releases in only 2 of the last 24 months−5 points
- No public issue tracker−3 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
13 points lost14 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.9 months ago (20 Jan 2026) 4 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.21.11 on Fabric, Forge and NeoForge. 29% of the 718 popular Fabric mods updated in the last 6 months also have files for 1.21.11. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 2 of the last 24 months 1 / 6Stability
Full points22 / 22Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.2 of the 17 modpacks with two or more versions removed it in a later one (12%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 7 / 7Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
10 points lost0 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.16,835 3 / 4Track record
6 points lost2 / 8AgeHow long the project has existed. It counts less when no new file came out recently.10 months, 21 releases 2 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 9 latest files for recent Minecraft versions. See Security
41 of the 71 points that apply = 58 out of 100.
Images
About
Keystone Expansion extends Pufferfish’s Skills with interconnected, MMO-style skill trees that turn ordinary survival play into long-term character progression; it adds categories rather than replacing the underlying skills framework. The trees cover Combat, Mining, Exploration and Mobility, Farming, Crafting and Artisan skills, Building and Architecture, Magic, Alchemy and Enchanting, and Taming and Companions. Players earn experience through category-specific activities, including fighting mobs, mining and traveling, harvesting and breeding, crafting and enchanting, and placing building blocks, then gain category skill points to spend on upgrades. In-game category hints explain how to earn experience, and some activities have anti-farming limits, such as a cap on combat kills per chunk. Trees combine smaller improvements to attributes such as health, armor, resistance, stamina, speed, luck, and damage with challenge nodes, keystones, and larger endgame milestones. Combat builds can specialize through keystones such as Fortress for durability, Hawkeye for ranged damage, and Warmaster for melee, with stances including Berserker, Bulwark, Duelist, Paladin, Skirmisher, and Sniper. Exploration progression rewards travel by walking, swimming, boating, riding, jumping, and flying, with upgrades such as Scout, First Leap, and Soft Steps leading to mobility-focused capstones including Roadrunner, Shadowstep, and Worldwalker. Farming progression is earned by harvesting crops, planting, breeding animals, and fishing, and its branches culminate in milestones such as Angler King, Beastmaster, Gourmet, Harvest Master, and Homestead Legend. Building progression rewards placing construction blocks and offers upgrades for reach, movement, luck, durability, and fall safety, with milestones such as City Forge, Grand Designer, Master Builder, and Skyline Legend. The pack is designed for both singleplayer and multiplayer and is intended for modpacks and servers using Pufferfish’s Skills; it also requires Pufferfish’s Attributes.
Written from Modrinth . How we write it
In-game changes
Does not change the game's code directly.
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Details
- Creator
- Courone_mc
- License
- All rights reserved
- Downloads
- 17K
- Created
- 26 Dec 2025
- Official pages
- Modrinth , CurseForge
- Links
- Wiki
Security
No harmful code found
We checked its files and read their code, without running it.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.10 latest files: the newest file for each Minecraft version and loader. The answer above is about the 9 for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
We read its code without running it: it contacts no web address while you play.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of all 9 files, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files and images and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found8 of 40 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file
Compatibility
See all 21 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with itModpacks that include Keystone Expansion Pufferfish's Skills in at least one of their versions, most downloaded first.
Heroes Kingdom22K downloadslast version with it 5 Oct 2026
Cute Frolicking Kittens3.3K downloadslast version with it 30 Dec 2025
Trials of Terra2.6K downloadslast version with it 31 Jul 2026
Renovated II649 downloadslast version with it 6 Aug 2026
WrightCraft638 downloadslast version with it 7 Mar 2026
Chaos of Titans620 downloadslast version with it 1 Feb 2026
Market520 downloadslast version with it 23 Feb 2026
The Industrial Revolution 2 - Wizard Boogaloo510 downloadslast version with it 3 Aug 2026
FunCube Adventure RPG508 downloadslast version with it 13 Jan 2026
create age of exploration501 downloadslast version with it 4 Aug 2026Latest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.