The demo version of Galactic Simulator: Great Filter is now available for a limited time!Enjoy single-player casual mode—try it now! (Multiplayer and some features are not supported in the demo version.)

《星际模拟器：大筛选》的演示版现已限时提供！享受单人休闲模式——立即试玩吧! （演示版不支持多人游戏和某些功能。）

Galactic Simulator is a clicker game based on the Fermi Paradox and the Great Filter theory. Players can simulate the evolution of celestial bodies and civilizations in the galaxy from an observer's perspective. Fermi ParadoxAs of now (2025), there is no reliable evidence to suggest that extraterrestrials have visited Earth.— "Where are they?"Drake equationN = R* × Fp × Ne × Fl × Fi × Fc × L    N：The number of detectable extraterrestrial civilizations in the galaxy    R*：The rate of formation of stars in the galaxy    Fp：The fraction of those stars with planetary systems    Ne：The number of planets, per solar system, with an environment suitable for organic life    Fl：The fraction of those suitable planets whereon organic life appears    Fi：The fraction of life-bearing planets whereon intelligent life appears    Fc：The probability of a civilization emitting detectable signals    L：The lifespan of a civilizationThe Drake Equation helps us understand the probability of extraterrestrial civilizations existing. Galactic Simulator implements all the components of this formula.The Great FilterThe Great Filter is the idea that, in the development of life from the earliest stages of abiogenesis to reaching the highest levels of development on the Kardashev scale, there is a barrier to development that makes detectable extraterrestrial life exceedingly rare. According to the theory, Galactic Simulator defines the following Great Filters (evolutionary stages):    Suitable stellar systems and potentially habitable planets    Organic molecules (e.g., RNA)    Prokaryotic cells    Eukaryotic cells      Multicellular Organism    Intelligent OrganismTribal Stage    Civilizational stageCivilizations have a probability of failing at various stages of the Great Filter.Civilization Levels (Kardashev Scale)Once a planet reaches the civilization stage, it begins to develop its level of civilization, measured by the Kardashev Scale.Unique PlanetsEach planet has its own unique appearance and is fitted with real-world physical data.Game ControlsIf you're unfamiliar with the above theoretical background, don't worry—the game isn't complicated. There are only a few key click actions, and it provides detailed explanations and auto-completion options.Even without any player input, the galaxy will evolve over time on its own.Tips on in-game camera controls: WASD to move, Q/E to rotate, Z/C to zoomGame ModesCasual Mode：The success rate of most in-game events and the Great Filter is set to 50%.Realistic Mode：More realistic probabilities and data to simulate the real world.Multiplayer and LeaderboardsThe game supports multiplayer mode. Create a unique galaxy with friends!Supports leaderboards, letting players worldwide see your unique planet.About the DemoThe demo version of Galactic Simulator: Great Filter is now available for a limited time!Enjoy single-player casual mode—try it now! (Multiplayer and some features are not supported in the demo version.)

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