This study investigates the persuasive mechanism of slogans employed in responsible gambling campaigns. We analyse slogans from official posters in the U.S., Singapore, and Macau, focusing on two domains. First, the Theory of Planned Behaviour is applied to examine the intention to gamble expressed in the slogans to reveal how gambling is positioned in social contexts. Second, two framing devices—i.e., conceptual metaphors and the frame of gains/losses—are examined to understand how these framing devices reinforce the persuasive message while interacting with each other. Two models of persuasion emerge from our data—one encouraged ‘grounded games’ for enjoyment, while the other discouraged gambling due to its potentially ‘harmful’ consequences. We advocate for a gestalt view on the theoretical constructs that contribute to the overall effectiveness of persuasive messaging. These constructs should be integrated into an analytical framework, with particular attention given to the framing effect of conceptual metaphors and the gain/loss frame, and their interplay.