Launch Minecraft with FjordLauncher, a Prism Launcher fork that supports alternative authentication servers.
Open source
24 alternativesShatteredPrism
The ShatteredPrism fork of Prism Launcher supports alternative authentication servers.
About ShatteredPrism
ShatteredPrism is a custom launcher for Minecraft that lets users manage multiple Minecraft installations at once. It is a fork of FjordLauncher and is not endorsed by FjordLauncher or Prism Launcher. The project's README lists three differences from Prism Launcher: DRM removal, restored FTB modpack downloads, and support for alternative authentication servers.
Downloads are published on GitHub Releases. Users can also build the launcher from source by cloning the repository and following the Prism Launcher build instructions. The source code is licensed under GPL-3.0-only, while the logo and related assets use CC BY-NC-SA 4.0. The maintainer has stated that time for maintaining the launcher is currently limited and that updates to the latest version are expected once their situation is more stable.
Key features
- Manage multiple Minecraft installations within one launcher
- Removes PrismLauncher's DRM
- Restores the ability to download modpacks from FTB
- Supports alternative authentication servers
- Lets users add a custom authlib-injector JAR to a specific instance
- Source code available under GPL-3.0-only license
Best for: Minecraft players who want to manage several installations and connect through alternative authentication servers.
Good for
- Source code is open under the GPL-3.0-only license
- Supports alternative authentication servers and FTB modpack downloads
- Custom authlib-injector can be added to individual instances through the Version tab
Watch out for
- The maintainer currently has limited time to maintain the launcher
- Updates to the latest version are not yet available, according to the maintainer's note
ShatteredPrism at a glance
- Category
- Gaming › Game Guides, Wikis & Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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ShatteredPrism FAQ
How do I use a custom authlib-injector with an instance?
Select the instance in the main window, click Edit (or Ctrl+I / Command+I), go to the Version tab, click Add Agents, and select your authlib-injector JAR. If the JAR is not identified correctly, the Agent-Class field in its MANIFEST.MF should be moe.yushi.authlibinjector.Premain.
Where can I get support?
Users can create a GitHub issue or reach out on the project's Discord. The README asks users not to request support on official PrismLauncher channels, and to use FjordLauncher channels only for issues shared between the two projects.
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