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While color monitors had been used by several racing video games before (such as "Indy 800" and "Speed Race Twin"), it was during this period that RGB color graphics became widespread, following the release of "Galaxian" in 1979. "Galaxian" introduced a tile-based video game graphics system, which reduced processing and memory requirements by up to 64 times compared to the previous framebuffer system used by "Space Invaders". This allowed "Galaxian" to render multi-color sprites, which were animated atop a scrolling starfield backdrop, providing the basis for the hardware developed by Nintendo for arcade games such as "Radar Scope" (1980) and "Donkey Kong" followed by the Nintendo Entertainment System console.