Civ Builder vs Gravity Physics

You don't move the pieces in Civ Builder — you set the rules and let an artificial intelligence run a society inside them. Choose one of five governing archetypes — the intelligence that shapes how your citizens reason about each other, their work, and their laws. Write the legal code: decide what's forbidden and how strictly it's enforced. Then begin, and watch ten autonomous agents live their lives in a real-time event feed. They work and eat. They vote. They trade and innovate. They commit crimes — and face the punishments you wrote. Out of thousands of small decisions, a civilization takes shape: it can flourish into a stable, inventive society, or fracture and collapse under its own laws. Nothing is scripted. Every run unfolds differently. GOVERN, DON'T MICROMANAGE - Pick the AI archetype that governs your people's reasoning. - Author a living legal code and rewrite it mid-run to steer the outcome. - Intervene on the fly — inject events and change the law as a crisis unfolds. A SOCIETY THAT RUNS ITSELF - Ten autonomous agents make their own choices about work, food, voting, trade, and crime. - Emergent outcomes: no fixed win condition, no two runs alike. - A live event feed narrates everything as it happens. BUILT TO RESPECT YOU - 100% offline — the entire simulation runs on your device. - No accounts, no ads, no analytics, no tracking. We collect zero data. - Saved runs live on your device and never leave it. Set the laws. Choose the mind that enforces them. Then find out what kind of civilization you've created.

Gravity is a real-time N-body physics simulation of our solar system — fly a spacecraft through accurately modeled orbits, gravity wells, and atmospheres, all rendered in a clean top-down view of the ecliptic plane. Every body uses real physical data: mass, radius, orbital elements, and atmospheric density where applicable. Gravity between all 26 bodies — Sun, planets, major moons, and dwarf planets — is computed live using velocity Verlet integration, so orbits, perturbations, and gravity assists emerge naturally from physics, not scripted paths. FEATURES • Pilot your own spacecraft — configure engine count, thrust, and mass, then launch from Earth • True N-body gravity — every body pulls on every other body and on your ship, in real time • Realistic atmospheric drag and heating — feel the difference between skimming Earth's atmosphere and diving into Venus or Saturn • Time controls — speed up months of orbital motion or slow down to precision-dock in real time • Trajectory prediction — see where your current heading will take you before you commit • Flight trail — trace your path across millions of kilometers • Extended telemetry — track speed, altitude, gravity, thrust-to-weight ratio, dynamic pressure, hull temperature, time dilation, and more Whether you want to attempt a Hohmann transfer to Mars, slingshot past Jupiter, or just watch the Moon orbit Earth in fast-forward, Gravity gives you a physically accurate sandbox to explore the mechanics of our solar system.