AIM. FIRE. SURVIVE.
Defend six cities from the incoming barrage. Clear all 20 waves to win. Lose every city with no reserves and the game ends.
- Move mouse / drag on screen
- Aim
- Click / tap / SPACE
- Launch missile
- Arrow keys
- Move crosshair
- 1 2 3
- Select a battery
- A
- Auto-select battery
- P / ESC
- Pause / resume
- M
- Toggle sound
Aim ahead of the threat. Your missiles explode at the point you choose. Catch incoming missiles in the blast to set off chain reactions and multiply your points.
Each battery starts with 18 missiles and rearms between waves. Every 100,000 points increases total ammunition capacity by another 10%, compounded and rounded to whole shots, and immediately supplies the extra shots to surviving batteries. Every 150,000 points earns a bonus city: a lost city is restored after its explosion finishes, or the bonus is saved in reserve while all six cities are standing. Surviving cities earn 100 bonus points each, plus 5 for every unused missile. Splitting missiles appear from wave 3. Bombers arrive in wave 3, UFOs in wave 4, and guided bombs in wave 5, then gradually become more common. Each replaces one ordinary missile. Aircraft carry one missile; intercept them before they drop it. Guided bombs can briefly steer around blasts. Aim directly at them or overlap explosions.
