Psychophysiological game research faces the problem that for understanding the player experience, it needs to analyze game metrics and events with high temporal resolution and within the game context. This way greater understanding of gameplay and the player experience can be achieved with the use of physiological instrumentation. This is a presentation of a paper that presents a solution to recording in-game events and metrics, by sending out event byte codes through a parallel port to the physiological signal acquisition hardware. Thus, psychophysiological data can immediately be correlated with in-game data. By employing this system for psychophysiological game experiments, researchers will be able to analyze gameplay in greater detail in future studies.