Cooperative fierce video game playing ended in less aggression between video game partners (Experiment 1) and between non-video game partners (Experiment 2) than did competitive or stand-alone games. Interestingly, cooperative game play and no-game play produced equal degrees of aggression (Experiment 1), whereas competitive and solo game play produced equal levels of aggression (Experiment 2). These results correspond with the theory of bounded generalized reciprocity.