The arcade game Atari Missile Command is a classic. A never-ending wave of ballistic missiles is coming at the player's six cities.
You must protect the cities from enemy attacks to save them. Aim your three cannons anywhere you want and shoot down enemy guns. But there's more. Planes drop missiles and mortars, and drones with special explosives and ways to avoid missiles! You'll get a bonus city for every 10,000 points you earn. When all the cities are gone, the game is over, or "the end."
As you move up levels, your points will be multiplied by 1, 2, or even 3. You will get 100 points for each city that stays alive and 5 points for each missile that is still in the air.