Abstract: In the game/system of the invention, the screen of the display or a computer monitor represents a battle field, which is divided by a horizontal line or by parts of a horizontal line drawn across the screen and simulating the front line that separates the territories of the opposing sides/platforms. The weapon platforms or objects to be hit can be represented on both sides by conventional images of such items as missiles, UFO, tanks, ships, submarines, air crafts, or other moving or still objects. The projectiles can be represented by missiles, torpedoes, artillery shells, bullets, laser beams, bombs, etc. All actions can be controlled from the buttons of the computer mouse, via a joystick, by a screen-touch method, or other similar mechanisms. When the application is used as a simulator, the movements of the enemy's objects are controlled by a predetermined program.