A processing device includes: a detection unit configured to detect input information representative of a sequence of input signals for a video game that are input by a user using one or more input controls; an identification unit configured to identify one or more input signal variations in dependence upon one or more differences between the detected input information and predetermined input information representative of one or more predetermined sequences of input signals for the video game; a generation unit configured to generate assistance information in dependence upon the one or more identified input signal variations; and a provision unit configured to provide the generated assistance information to the user.