NBody

NBody is a physics-based puzzle game where you place asteroids, planets and stars, then send them toward matching targets. Everything attracts everything, and objects can move when a nearby object is heavy enough or when something crashes into them. The 100 hand-crafted levels begin simply and add more moving parts and harder solutions, so you need to plan your placements carefully.

Matter and gravity

The puzzles use an N-body gravity system based on real orbital mechanics. Targets do not move in most cases.

Two types of matter add different effects:

• Antimatter: A normal object that crashes into it is launched away and loses some mass. You can also avoid the collision when you need to keep an object onscreen.
• Exotic matter: Its negative mass makes it push objects away instead of attracting them, though normal matter still attracts it.