39.10 Fortnite Ecosystem Updates and Release Notes

The 39.10 release adds new LEGO® NINJAGO® content, including a starter island template and themed assets, and delivers new mobile UI enhancements to support cleaner interfaces on mobile devices. Also included: new Twinkle Terrace Prefabs and Galleries!

Action Required: Verse API Change for In-Island Transactions

For developers using the experimental release of in-island transactions, we have made a change to the Marketplace module in the Verse API. The product class has been renamed to entitlement. You will need to update your Verse code for any items you have created, replacing product with entitlement.

Additionally, the In-Island Transactions feature example and all of the documentation has been updated to account for the entitlement change, if you need additional examples or references.

For 39.10, the experimental flag has been removed for in-island transactions, but publishing will not go live until 39.20 (January 9, 2026).

Ask Epic: Mobile Development in UEFN — December 18 at 11AM ET

In our upcoming Ask Epic, we’ll take your questions on mobile development in UEFN. Topics may include how to design and optimize for mobile play, getting started with our recently launched mobile-specific tools (Mobile Preview and Custom Input & Touch Control), working with smaller screens, touch-interface considerations, and more.