The Witcher is a multimedia franchise of books, video games, television series, and movies based around the written works of Polish author Andrzej Sapkowski. - Wikia
I'm interested in trying out this universe.
However, I like to fully get the whole canon (which is what attracts me to complicated universes).
As such, I am somewhat deterred from Witcher by the worry that in order I would have to play the Witcher video games (which - as a non-gamer - irked me to no end about Star Wars EU. God bless Wookiepedia and its little frequently inaccurate heart).
Is there any meaningful material in "Witcher" canon that requires playing games to learn and isn't also covered in books/movies/TV?
By that I mean, either universe rules, or specific important events that affect continuity or character story, etc....
 ...assuming I don't cheat and read that canon data off of linked Wikia :)