Managers are involved in various tasks every day - planning, hiring, team organization, communication, giving feedback, performance evaluation etc. - but how can we tell what will have a positive or a negative impact on our team's motivation? Self-Determination Theory (SDT; Deci & Ryan, 2000) can help with that. SDT is a macro theory of human motivation that emerged from the research on intrinsic and extrinsic motivations and identifies three universal psychological needs that, if satisfied, enable optimal function and growth: competence, autonomy and relatedness. In this talk, Alexandre Moufarek introduces SDT and gives practical examples taken from a manager's day to day tasks and discusses what can facilitate or undermine a team's motivation (supported by research findings). Happy game developers make happy gamers is not just a saying. It's science.