OrbitDefense is a free online arcade shooting game where your mission is simple: keep objects from smashing into your planet. You control a spinning ball that orbits the planet, and every time you press down on the screen, the ball swings around and destroys whatever is crashing toward you. Fast reactions are everything here.

The core mechanic is satisfying and sharp. Timing your press too early or too late means an object slips through and damages the planet. As you survive longer, objects come in faster and from trickier angles, forcing you to think about rotation timing rather than just mashing the screen. There are no complicated controls to learn — just tap or click, and the ball does the work. The challenge comes from reading trajectories and staying calm when multiple threats stack up. Every run feels slightly different, and beating your own high score keeps you coming back for more rounds.

OrbitDefense is perfect for players who enjoy quick arcade challenges, single-player skill games, and casual space-themed action. If you like planet defense games, orbit-based arcade games, or tap-to-survive shooters, this one checks all those boxes. It runs directly in your browser with no download or install required, making it ideal for a quick session on desktop or mobile. Search terms like free planet defense game, online orbit arcade, or one-tap shooting game all lead here — and once you start playing, you will understand why.