Is there a website where you can legally get free video games

illegally? yes, of course, but for legal free games originally for consoles, google something like, "n64 emulator" or "ps1 emulator" download the software, and you'll be free gaming in no time

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Technically speaking copies of cartridges and eproms for now defunct video gameing machine run under emulation is also ilegal. However there is a number of companies who have released the copyright into the public domain. This is true of a few games on the mame32 emulator.