GameMaker Studio 2 (2.3)

YYC Boost

Patrik Kraif

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YYC Boost is a command line utility using which you can modify C++ files created during YYC compilation in GameMaker Studio 2.3+.

WARNING: This tool is currently in an early stage of development and it is not guaranteed to work in all projects/cases! Use at your own risk! Currently only the Windows YYC target is supported! Make sure to read the documentation before the first use!


  • Multithreading - Run functions in a separate thread!
  • Task system - Uilize multithreading for parallel tasks! Includes fallback for VM.
  • C++ types of local variables - Define C++ type of a var to save memory and increase performance!
  • C++ code injection - Replace function with a custom C++ code!

Support the project:

YYC Boost is free and open-source, released under the MIT license on GitHub. By purchasing this package, you support further development of the project.


End User Licence Agreement (EULA).

Age Rating: 4+


GMS2.3 - Version 0.1.1. Published October 14, 2021

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