Space Attack

Space Attack is a fixed shooter arcade game that was released by Sega in 1979; it was the first title to run on their then-new Vic Dual hardware (a Zilog Z80 running at 1.93356 MHz) and appears to be a clone from Taito Corporation's legendary Space Invaders which was released in the previous year. However, the background is blue instead of black, the scores have been multiplied by ten and all the characters have been altered - and if the arcade operator has set that "Last UFO Awards Bonus" dip switch to "On" you will receive an extra life if a UFO flies into view at the top of the screen at the end of a stage and you manage to shoot it, regardless of points. The rest of the rules remain unchanged; however, games could last longer than those of Space Invaders, due to its "last UFO bonus" feature.