Spy Daisakusen is a single-player adventure game in which players navigate through a modern espionage setting, solving puzzles and completing missions to progress. In this game, the storyline revolves around a secret agent tasked with thwarting a global threat, set against the backdrop of contemporary urban environments and high-tech facilities. It stands out with its early adoption of a modern setting for an RPG, diverging from traditional fantasy themes, and is notable for being one of the first Japanese RPGs based on the Mission: Impossible franchise, incorporating elements of stealth, strategy, and narrative-driven gameplay.