A lightweight, clean, and open-source Minecraft launcher focused on Vanilla and Fabric, built with simplicity and performance in mind.
CascadeMC is a Python-based Minecraft launcher designed for users who want:
- A fast and minimal launcher
- Full control over their Minecraft setup
- Crack support without Microsoft authentication
- Open-source transparency
It supports Vanilla and Fabric, with basic mod functionality already available.
- The compiled (.exe) version may not work on all systems.
- For best stability, install via source code and run it manually.
- Mod support is available but still experimental.
✔ Yes, crack is supported CascadeMC is a cracked launcher by default and will never add Microsoft authentication.
- Uses authlib-injector for multiplayer support
- Offline & custom usernames supported
Yes.
- CascadeMC is 100% open source
- You can inspect, audit, and compile the code yourself
- No hidden behavior, no telemetry, no closed-source components
Unlike launchers such as TLauncher, CascadeMC is fully transparent.
Step 1 – Download the source code as a ZIP Step 2 – Extract the ZIP file Step 3 – Open Command Prompt and navigate to the project folder:
cd C:\path\to\cascadeMCStep 4 – Install dependencies:
pip install PySide6 requests minecraft-launcher-lib uuidStep 5 – Run the launcher:
python main.py✅ Your launcher is now ready!
Note
On Linux based systems, you will need to create a venv to launch it.
Step 1 – Download the latest release
Step 2 – Extract the files
Step 3 – Launch CascadeMC.exe
- 🪶 Lightweight & fast executable
- 🧵 Fabric mod support
- 🔓 Crack-only client (authlib-injector)
- 👕 Skin preview before launch
- 🧠 Custom RAM allocation
- 🖥️ Integrated PaperMC server creator
- ☕ Automatic Java installation if missing
- 🎨 Modern UI built with PySide6 (It was a pain to learn 😄)
- 📜 Clean and readable log system
CascadeMC is straightforward to use:
- Select a Minecraft version
- Install Fabric or Vanilla
- Add mods manually
- Launch and play
If you fork this repository, please credit the original author ❤️
- ✅ Mod support by default
- ✅ Multiple version support
- ✅ Improved UI
- ✅ Server support
- ✅ Multiplayer support (authlib-injector)
- ❓ Mods marketplace (maybe)
- ❌ Cosmetics system (not planned)
CascadeMC is a passion project, not a corporate launcher. If you encounter bugs, have ideas, or want to contribute — PRs are welcome!
Enjoy Minecraft, your way 🌊⛏️