GameMaker (2.3)

EpicOnlineServices Ext

YoYo Games

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  • This extension is to be used with GM 2023.1 and future releases.
  • This version will be compatible with 2022 LTSr1 (upon release).
  • Requires EOS SDK version 1.15.4 (or recent)
  • Works with Windows and macOS (YYC only).
  • Linux (VM and YYC) is still experimental (there is no official launcher)


For issues/bugs, please use the Github Issue Tracker and ensure reproducibility with the provided demo project. This helps our team promptly address concerns and provide fixes.


Epic Online Services is a set of tools and services that help game developers and publishers build their games and get the most out of distributing on Epic Store.


  • Achievements API
  • Auth API
  • Connect API
  • Friends API
  • Leaderboards API
  • Metrics API
  • Platform API
  • Player Data Storage API
  • Progression Snapshot API
  • Sanctions API
  • Stats API
  • Title Storage API
  • UI API
  • User Info API


The full documentation of the API is included in the extension asset (included files).

End User Licence Agreement (EULA).

Age Rating: 4+


GMS2.3 - Version 1.4.2. Published May 16, 2024

  • Updated build system scripts to allow for proper builds from CLI
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