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Attention: We always welcome contributors to the project. Before adding your contribution, please carefully read our Code of Conduct.

Current features

• Logging in
• Combat
• Friends list
• Teleportation
• Gacha system
• Co-op partially works
• Spawning monsters via console
• Inventory features (receiving items/characters, upgrading items/characters, etc)

Quick setup guide

Note: For support please join our Discord.

Requirements

• Java SE - 17 (link)

  Note: If you just want to run it, then jre only is fine.

• MongoDB (recommended 4.0+)

• Proxy daemon: mitmproxy (mitmdump, recommended), Fiddler Classic, etc.

Running

Note: If you updated from an older version, delete config.json to regenerate it.

1. Get grasscutter.jar
   • Download from actions
   • Build by yourself
2. Create a resources folder in the directory where grasscutter.jar is located and move your BinOutput and ExcelBinOutput folders there (Check the wiki for more details how to get those.)
3. Run Grasscutter with java -jar grasscutter.jar. Make sure mongodb service is running as well.

Connecting with the client

½. Create an account using server console command.

1. Redirect traffic: (choose one)

   • mitmdump: mitmdump -s proxy.py -k

     Trust CA certificate:

     ​ Note: The CA certificate is usually stored in %USERPROFILE%\ .mitmproxy, or you can download it from http://mitm.it

     ​ Double click for install or ...

     • Via command line

       certutil -addstore root %USERPROFILE%\.mitmproxy\mitmproxy-ca-cert.cer
       

   • Fiddler Classic: Run Fiddler Classic, turn on Decrypt https traffic in setting and change the default port there (Tools -> Options -> Connections) to anything other than 8888, and load this script.

   • Hosts file

2. Set network proxy to 127.0.0.1:8080 or the proxy port you specified.

you can also use start.cmd to start servers and proxy daemons automatically, but you have to set up JAVA_HOME enviroment

Building

Grasscutter uses Gradle to handle dependencies & building.

Requirements:

• Java SE Development Kits - 17
• Git

Windows

git clone https://github.com/Grasscutters/Grasscutter.git
cd Grasscutter
.\gradlew.bat # Setting up environments
.\gradlew jar # Compile

Linux

git clone https://github.com/Grasscutters/Grasscutter.git
cd Grasscutter
chmod +x gradlew
./gradlew jar # Compile

You can find the output jar in the root of the project folder.

Commands have moved to the wiki!

Quick Troubleshooting

• If compiling wasn't successful, please check your JDK installation (JDK 17 and validated JDK's bin PATH variable)
• My client doesn't connect, doesn't login, 4206, etc... - Mostly your proxy daemon setup is the issue, if using Fiddler make sure it running on another port except 8888
• Startup sequence: MongoDB > Grasscutter > Proxy daemon (mitmdump, fiddler, etc.) > Game