Unity surprised everyone this morning during the Unite 2025 keynote in Barcelona, Spain, when Epic Games CEO Tim Sweeney was suddenly called on stage to announce a partnership between the two companies behind the most used third-party game engines in the industry.

Sweeney said he spoke with Matthew Bromberg, president and CEO of Unity (who replaced John Riccitiello after the former CEO's resignation following the runtime fee controversy ), about the companies' sh ared objective of supporting open digital platforms.

The first result of this collaboration will be that Unity's brand-new in-app purchase software development kit (SDK) will soon be available to Unreal Engine developers, allowing them to choose this API to handle cross-platform purchases. Sweeney noted that this will bec

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