Sky Shield

Overview

Sky Shield is a command-view defense game about geometry and ammunition. Six cities line the bottom of the screen between two interceptor batteries, and each wave drops ballistic warheads from the top of the sky onto random targets — cities, or the batteries themselves. You do not shoot warheads directly; you order interceptors to detonate at a point in the sky, and the resulting blast grows, lingers, and shrinks over about a second. Anything hostile inside the ring dies, and dying warheads bloom into secondary blasts of their own, so one well-placed shot can cascade through a whole salvo. Ammo is strictly rationed: each battery reloads only between waves, and a battery that takes a direct hit is gone for the run. Enemy planes cross the sky dropping extra warheads and pay four times a warhead's value. Between waves you bank 100 points per surviving city and 5 per unused interceptor, one ruined city is rebuilt every second wave, and surviving all eight waves wins the night.

How to Play

Press Start Game, then click or tap anywhere in the sky — the nearest live battery with ammo launches an interceptor that detonates at exactly that point. On keyboard, steer the amber crosshair with the arrow keys and press Space to fire at it. P pauses, R restarts. The wave counter and the warhead trails tell you the whole situation: every red trail terminates at a city or battery it will destroy unless intercepted. The wave ends when every incoming warhead has landed or been stopped; then bonuses are tallied, ammo reloads, and the next wave arrives faster and denser. Lose all six cities and the run ends immediately.

Tips & Strategy

Lead everything. A warhead moves while your interceptor flies, and the blast persists, so the correct aim point is on the trail ahead of the warhead — pick a spot the warhead will occupy in about a second and let it fly into the ring. Blasts chain, which changes the math on clustered trails: when two or three warheads descend on parallel paths, detonate between them and let sympathetic blooms finish the group for the price of one interceptor. Protect the batteries before the cities in the mid-game — a dead battery halves your rate of fire forever, while a dead city is rebuilt on even-numbered waves, and the end-of-wave ammo bonus rewards batteries that never had to shoot. Speaking of which: stop firing the instant the last warhead of a wave is resolved, because every unspent interceptor is worth 5 points at tally. Against planes, place the blast slightly ahead of the nose rather than on the fuselage; they are fast, but 100 points plus two denied warheads is the best trade on the board. On waves seven and eight, triage ruthlessly: let an edge city go if saving it would take three interceptors you need for the battery.

What Makes It Distinct

Sky Shield is a shooter where the shot you fired five seconds ago is still working. The lingering-blast-plus-chain-reaction model turns aiming into scheduling, and the permanent battery damage makes defense triage a genuine economy — few arcade games make restraint this profitable.