This research examines the effect of cooperative versus non-cooperative game play on immersion and enjoyment in online games. It draws on the self-determination theory to generate the research hypotheses and explain the observed phenomenon. A within-subject experimental design (N=38) was used to evaluate the effects of cooperative versus non-cooperative game play on enjoyment and immersion by having participants play in a manipulated game mode in a controlled gaming environment. The participants\u27 subjective responses were assessed to understand their user experience in cooperative and non-cooperative gaming environments. The results suggest that both immersion and enjoyment were significantly enhanced in cooperative game play. --Abstract, page iii
