Orbital Defense Idle

Orbital tower defense

Orbital Defense Idle is a sci-fi idle and incremental tower defense game about defending your solar system from an endless fleet. You fortify a planet’s defense matrix, fight through escalating attacks, and push across 20 worlds, from Terra to Noctivorn 9 and the outer reaches of the galaxy.

Each world brings a new environment, challenge, story, and set of unlocks. More than 40 enemy types include swarms, elites, and bosses, with the fleet growing harder and evolving as you progress.