Sentry's Unreal Engine SDK (v1.16.0) now supports Session Replay, which continuously records the last several seconds of gameplay and attaches the video clip to crash reports. Built entirely on Unreal-native facilities, the recording pipeline hooks into Slate's backbuffer, encodes frames via hardware H.264 encoders (NVENC, AMF, VideoToolbox), and maintains a rolling ring buffer of fragmented MP4 clips. When a crash occurs, the clip is bundled with the crash report and uploaded to Sentry, where developers can watch exactly what the player saw before the crash alongside breadcrumbs, logs, tags, and trace spans. Performance overhead at 4K is roughly 0.20 ms per frame (~3.6% frame time increase), with most work offloaded to background threads. The feature is experimental, currently lacks automatic content masking, and is enabled via a single toggle in Project Settings after enabling the relevant AVCodecs plugins.
