Game engine "Unity 7" announced, runtime foundation migrates from Mono to .NET CoreCLR. Performance improvements make Play Mode launch almost instantly from the editor

Unity announced Unity 7, a next-generation engine update that swaps Mono for Microsoft’s CoreCLR runtime.

The runtime change is designed to speed up workflows, with near-instant play mode startup and much faster shader builds.

Unity 7 also adds AI agent integration and rendering improvements, signaling a push toward modern AI-assisted development.

The upgrade could boost productivity for developers using one of the world’s most widely used game engines.