Reflection Tree develops RTree, an on-device collaborative planning system for Unreal Engine 5 designed to help game developers create more capable companion NPCs. The system lets players coordinate with non-player characters through practical requests, such as arranging a timed distraction, sending a character to market to sell looted items, or organizing a coordinated attack on an enemy position. This approach emphasizes creative collaboration between players and NPCs, extending beyond simple scripted commands.

RTree is built with developer workflows in mind. It handles asynchronous, multithreaded computation, GPU caching, response validation, and resource management. Its developer API is based on minor extensions to Unreal Engine 5’s existing Gameplay Ability System, helping teams integrate planning capabilities within familiar gameplay infrastructure. The system runs on Nvidia and AMD GPUs and has been tested on Nvidia RTX 4000-series and AMD Radeon 7000-series hardware. Reflection Tree lists RTree as coming soon to Fab in May 2025 and provides contact through [email protected].