A computer-implemented method and computing system for sensing gameplay events and optionally and preferably augmenting a video feed with overlay, comprising in some embodiments a data acquisition module, a sensor module, and optionally and preferably an overlay module. By describing the state of gameplay with models that capture the semantics of the game and comparing this description to a library of event patterns using one or more pattern matchers defining different ways of evaluating criteria, occurrences of events are detected. Detected events are processed by the overlay module to generate video feed augmented with overlay illustrating said events.