Secret Game: Killer Queen is a single-player adventure and visual novel game in which players navigate a tense scenario involving 13 individuals trapped inside an abandoned building, each with unique objectives linked to their PDA devices. In this game, the storyline revolves around these characters who have no memory of how they arrived there, each equipped with a collar device that threatens their life if they fail to complete their assigned goals within 72 hours or break the rules. It stands out with its intense psychological themes, high-stakes decision-making, and the integration of a countdown mechanic that adds urgency to the gameplay, along with diverse objectives that can range from mere survival to active elimination of others, creating a complex web of interactions and choices.