Orbital Siege

There are no lanes — drop gravity wells into open space and curve incoming comets away from your homeworld and into the central star.

How to play

This is tower defense without fixed paths. Waves of comets streak toward your homeworld, and your defenses are gravitational masses that warp their trajectories. Place wells, anchors and other structures during the build phase, start the wave, and watch the swarm bend off course. Destroyed enemies pay salvage, which you reinvest to upgrade your masses or add guns, mines, patrol ships and support.

• Pick a mass from the palette, then click open space to place it.
• Position masses so their pull steers comets into the star — not into your homeworld.
• Earn salvage from kills to upgrade existing defenses or build new ones.
• Survive escalating waves; each one is faster and heavier than the last.

Controls

• Desktop: click to place the selected mass; number keys 1-5 pick a tool; click a placed mass then U to upgrade or S to sell; Space starts the wave.
• Phone & tablet: a mouse and keyboard are recommended — the build-and-place controls are designed for pointer and key input.

Tips & strategy

• Stack pulls along a comet's likely arc rather than right on top of your homeworld.
• Sell and reposition early masses once you see the wave's real approach angle.
• Mix steering masses with guns and mines to mop up comets that slip the gravity bend.

About Orbital Siege

Orbital Siege is an original free browser game that reimagines the tower-defense genre with open-field physics instead of set paths, defending a homeworld with pure gravity. Built in-house for PlayPendium, it plays entirely in your browser.

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