Apple's WWDC26 session introduces new tools and workflows for profiling Metal-based games over long play sessions. Key highlights include: a system-level look-back mechanism that continuously records Metal performance metrics for days (accessible via a new `metalperftrace` CLI on macOS 27 or a Control Center button on iOS); a new StateReporting API that lets developers annotate game state (levels, graphics settings, network status) as finite state machines, enabling contextual analysis of frame rate drops; and MetricKit enhancements in iOS/macOS 27 that deliver daily Metal frame rate reports from player devices, broken down by StateReporting states. The session also covers the Game Performance Overview Instruments template, how to use metalperftrace for JSON output suitable for regression testing or AI triage, and best practices for designing orthogonal, low-frequency state domains.