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An 8-bit handheld game console developed and manufactured by Nintendo. Now popular among home-brew creators and modern developers looking to capture a retro style

PICO-8 is a fantasy console powered by Lua. Games are distributed as cartridges which double as PNG  images. 

Pixel Art refers to the charming, simplistic, retro/renaissance style of very-low-resolution graphics, such as from the 1977-1995 Atari, GameBoy, & Super Nintendo (SNES) eras.