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First Generation (1972-1979; mostly Pong clones)
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Second Generation (1976-1984; Atari 2600, Magnavox Odyssey, Intellivision, Atari 5200, Vectrex, ColecoVision, SG-1000)
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Third Generation (1983-1990; NES, Sega Master System, Sharp X68000)
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Fourth Generation (1987-1996; TurboGrafx-16, Sega Genesis, Neo-Geo, SNES)
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Fifth Generation (1994-2001; PlayStation, PC FX, Sega Saturn, Nintendo 64)
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Sixth Generation (1998-2005; Dreamcast, PlayStation 2, Nintendo GameCube, Xbox)
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Seventh Generation (2005-present; Xbox 360, Wii, PlayStation 3)