GameMaker has rolled out a new runtime and command line toolchain that shifts its development model beyond a traditional integrated development environment (IDE). It also introduces AI-assisted workflows through Anthropic’s Claude Code. The update, announced April 30, 2026, positions the engine to support automation pipelines, larger teams, and developers working across multiple programming environments.
At the core is the GameMaker Runtime (GMRT), built to handle more complex production needs and broader language adoption.
Alongside it, the GM-CLI toolchain enables developers to build and manage projects without opening the IDE. Project files are now stored as plain text, allowing easier version control and integration with systems like Git and automated build pipelines.
Claude Code is embedded within this CLI layer, allowing developers to describe tasks in natural language and execute them directly in the terminal. The system can navigate codebases, run tests, modify files, and iterate until issues are resolved, operating at a project-wide level rather than line-by-line suggestions.