Frostline Defense

Frostline Defense is a landscape interception game above a snowy pixel-art city. Incoming red rockets descend toward three marked districts. Tap a point in the sky to launch a cyan interceptor from the central battery. The interceptor travels to your chosen point and creates a brief expanding blast. Enemy rockets caught inside that blast are destroyed before they can reach the city.

LEAD THE THREAT
An interceptor does not arrive instantly. Aim ahead of a descending rocket so its path meets the blast as it expands. A blast grows and then fades, giving you a short opportunity to intercept a nearby threat. Several enemy rockets can be caught by the same blast when their paths converge. The visible trails help you read which district an incoming rocket is approaching.

WATCH YOUR AMMUNITION
Each mission provides a limited stock of interceptors. A short firing interval prevents multiple shots from being launched at exactly the same instant. Tapping outside the playable sky is clamped to a valid target point, and exhausted ammunition prevents further launches. Aim carefully rather than assuming every tap will stop a threat. The mission number, remaining ammunition and spawned threat count appear in the compact upper display.

KEEP A DISTRICT STANDING
A rocket that reaches its destination disables that district. The three city markers show which districts are still safe and which have been lost. A mission succeeds when every scheduled threat has been resolved and at least one district survives. Losing all three districts ends the attempt. You may retry immediately, open the next mission after a success or return to the operations screen.

FIFTY WINTER WAVES
Operations are divided into five sectors of ten missions. Later waves introduce more rockets, shorter gaps between arrivals and faster descents, with additional ammunition. All missions are available immediately and completed ones are marked locally. Continue restarts the most recently selected mission. Pause stops the battle, and backgrounding the app suspends its simulation. The wide playing field leaves room to trace incoming paths while keeping the battery and surviving districts visible.

LOCAL PLAY AND SETTINGS
The main menu contains Play, Settings, How to Play and Exit. Progress and preferences are stored on this device. Settings switch interface sounds, touch feedback and button fades on or off; essential gameplay motion remains active. The touch interface is in English. No advertisements, purchases, account registration or internet connection are required. There are no online rankings or cloud saves. Clearing application data removes local progress and preferences. Original artwork appears inside the game as well as in its icon and title banner.