This study investigates the effects of advergame customization features and trust in the brand advertised in the advergame on players' brand attitude and personal information disclosure. Moreover, we examine to what extent players' privacy concerns moderate these effects. Drawing on self-determination theory and uncertainty reduction theory, we developed and tested a game with varying levels of customization features and brand trust. Results show that customization possibilities and brand trust may have a positive influence on advergame persuasion outcomes, but this influence is strongly conditioned by consumers' privacy concerns. When privacy concerns are low, a game containing customization features leads to a more positive brand attitude. However, when privacy concerns are high, the effect becomes negative. Additionally, we find that different levels of privacy concerns do not affect players' responses toward high trust brands, but toward low trust brands. For low trust brands, players with high privacy concerns show more negative game responses than players with low concerns. These findings set the boundaries for several theoretical and practical implications regarding advergame effectiveness.