⭐ STELLAR GRAVITY

A 2D universe you can break.

▶ Watch the trailer

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Throw a star into the dark. Watch it catch a planet in orbit.

Now throw a second star — closer this time — and watch the whole thing come apart.

Stellar Gravity is a physics toy, not a game. No goals, no score, no way to lose. Just you, Newton's laws, and a growing pile of things you've flung into space. Drag to launch a body, then let real gravity take over: orbits form, stars ignite and die, and sooner or later everything hits something.

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💥 What can happen

Stars live and die properly. They burn through their fuel, swell into red giants, and collapse into white dwarfs, neutron stars, or black holes — depending entirely on their mass.

Real cataclysms. Supernovae. Kilonovae that scatter gold and platinum across the system. Tidal disruption as a star gets pulled into spaghetti. Neutron stars colliding at the edge of physics.

Black holes that actually bend space. Watch the starfield warp and curve around the event horizon.

Exotic toys. Antimatter. White holes that spit matter out instead of swallowing it. Strange matter that converts everything it touches. Wormholes you place yourself.

🎛️ Bend the rules

⏩ Time control	Fast-forward an entire stellar lifetime, or slow to bullet time to watch a collision frame by frame.
⏪ Reverse time	Un-explode a supernova. Watch orbits run backwards.
🌀 Relativity	Turn it on and watch orbits precess, just like Mercury.
🌌 Dark energy	Crank it up and tear the universe apart.
🔭 Visual tools	Gravity grid, orbit paths, Lagrange points, light-delay, long exposure, photo mode.
💾 Undo & Save	Break things fearlessly — undo brings it all back.

11 ready-made scenarios, from a peaceful solar system to a full galaxy collision, a neutron star arena, and an antimatter playground.

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🎮 Controls

It takes about five seconds to learn:

• Drag in empty space to fling a new body.
• Click a body to lock the camera onto it.
• MENU for scenarios, spawners, and physics toys.
• H for the full help screen.

Everything else is discovery.

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🔊 There are no art or sound files

Not one. Every star, every glow, every explosion, and every note of the soundtrack is generated in code at startup. The whole universe — visuals and audio — is math.

The entire game is a single C++ file built on raylib.

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💻 Available for Windows & Linux

Download, unzip, run. No installer.

Windows note: Windows may warn that the app is "unrecognized." That's because it isn't code-signed (certificates cost money) — it's safe. Click More info → Run anyway.

If the window doesn't open, update your graphics drivers — the game needs OpenGL.

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Made for anyone who's ever wanted to know what happens if you put a black hole right there.

./Stellar-Gravity

chmod +x Stellar-Gravity
./Stellar-Gravity