The Grand Conspiracy is a role-playing game of ordinary humans discovering the truth about aliens, government cover-ups, and anal probes.

Characters consist of a Desire, a Curse, three Aspects, and five numerical statistics: Humanity, Will, Strength, Survival, and Level. There's also a Fate Point economy, allowing players to bump up their characters' chances at succeeding in actions. The game uses Fudge/Fate dice (which can be replicated with the use of six-sided dice).