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Lambda is a free, open-source, Minecraft 1.12.2 utility mod providing a visionary system for plugins that allow customizing the clients features thanks to an ingame plugin store.

lambda-2.07.01.jar - July 1, 2021 - 12.0 Mb


Clone Repository

Clone the repository to your local machine. Use the link of either your fork or the main repository.

git clone

Run scripts/ to initialize the environment. With terminal on Linux or Git Bash for Windows


Setup IDE

In this guide we will use IntelliJ IDEA as IDE.

  1. Open the project from File > Open...
  2. Let the IDE collect dependencies and index the code.
  3. Goto File > Project Structure... > SDKs and make sure an SDK for Java 8 is installed and selected, if not download it here

Gradle build

Test if the environment is set up correctly by building the client and run it inside IDE using the Gradle tab on the right side of the IDE.

  1. Go to lambda > Tasks > build > runClient in the Gradle tab and run the client or create a native run using lambda > Tasks > fg_runs > genIntelliJRuns.
  2. To build the client as a jar run lambda > Tasks > build > build. IntelliJ will create a new directory called build. The final built jar will be in build/libs

Thanks to

zeroeightysix for the original KAMI

the Kami Blue team for the continuation of KAMI

ronmamo for Reflections

The Minecraft Forge team for Forge

All the contributors, including the ones who will be remembered in comments and in our hearts. This has been a huge community effort, and we would not be here without you.