Recently, the amount of pressure that is exerted on an input device during a gaming session has been shown to correlate with several aspects of the game experience. While studies have used this metric in a game analysis perspective with promising results, there is still a lack of comparison between the performance of this metric compared to physiological metrics or self-assessment method. Therefore, we conduct an experiment in which we compare exerted pressure against the electrodermal activity (EDA), heart rate (HR) and self-assessment of a subject during a gaming session. Our results indicate that pressure can be used to assess the perceived game difficulty, possibly even better than EDA and HR.