This thesis contains an extensive exploration of the music and non-musical audio of various video games, with an emphasis on the effects the aforementioned video game music and non-musical audio have on the behaviour and performance of players of the observed video games. The thesis introduces the reader to the concept of sound and the way the human brain perceives auditory stimuli, as well as explains the ways in which the aforementioned stimuli can directly effect the emotional world of their listeners. Following that, the plan and research methods which will be used in the analytical part of the thesis are explored in detail – the goals of the thesis and all relevant terms and variables of the research in question, as well as the composition and natures of the examinees are defined and presented. The main method with which the research is conducted is with the use of multiple research surveys which have been put together for a group of varying video game titles for the purposes of examining the effects that stimuli of various natures and intensities can potentially have on the behaviour of players of the observed video games in question. The exploratory part of the thesis is reserved for the analysis of the results gained from the entire research process, as well as result comparisons between the data of differing video game genres and the following discussion and forming of general conclusions. The greatest importance within the scope of the research is given to the analysis of the effects that music and non-musical video game audio can have on the performance levels which players demonstrate within the video game world during their play, to the emotions which the players feel during their play, as well as their opinions of the video games in question and their sound design in general. The final part of the thesis is dedicated to the proving of the hypotheses made during the thesis' research, as well as the conveying of final thoughts and conclusions about the thesis' findings as a whole.