Valve has open-sourced Lepton, an Android compatibility layer for the Steam Frame headset, allowing VR developers to adapt existing Android games for the device. The code is available on Valve's GitLab repository and facilitates the transition without needing to reconstruct games for a different platform. Lepton is designed to create a game-optimized Android environment rather than transforming the Steam Frame into a general Android device. It disables unnecessary Android services to maintain efficiency and integrates with the SteamOS host system, supporting various graphics stacks and Vulkan tools for enhanced VR gaming. Lepton operates without requiring root access, with each process running as a non-root user, and provides developers with tools for debugging and performance profiling. The open-sourced code offers insight into Valve's approach to supporting Android games on SteamOS.