Are 'The Witcher' Games Part of the Fictional Universe's Canon?

It's no secret that 'The Witcher' games were instrumental in bringing Andrzej Sapkowski's work to the masses, but are they canon?

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Are the Witcher Games Canon to the books?

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Are 'The Witcher' Games Part of the Fictional Universe's Canon?

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I don't care what Sapkowski says about “fan-fic” game canon, this is the ending of the series for me : r/witcher