Commando (1983)

Commando, never to be confused with Senjō no Ōkami, the 1985 Capcom arcade game which later gained the title of "Commando"), is a fixed shooter arcade game, that was released by Sega in 1983; it utilizes two Zilog Z80 microprocessors (running at 3.072 and 1.789772 MHz respectively), with two General Instrument AY-3-8910s running at 1.789772 MHz for sound. The player must use a two-way joystick, to direct a small pink tank left and right across the bottom of the screen, with a single button to make it fire shots into the air at the enemies - enemy aeroplanes are worth either 50 or 200 points, while parachutists are (always) worth 200 points, enemy soldiers are worth 300 points and "BONUS" rocks are worth 500 points (when you shoot one of them, the text of "BONUS" will disappear, and an orange flag will appear on top of it, so you can't shoot it again). However, unlike the shields in Taito's legendary Space Invaders, these rocks won't provide temporary protection from enemy fire; they are merely there for the maximum of 4000 bonus points per stage they will award when shot, and if your tank gets hit by an enemy bullet (or parachutist), or sabotaged by an enemy soldier, it will lose a life. Once your tank has run out of lives (it starts with three under default settings) the game will be over.