What ? by 3 witcher game i mean The Witcher, The Witcher Assassins of Kings and The Witcher 3 Wild Hunt, the 2 Witcher game no one ever heard of are The Witcher Adventure Game and The Witcher Battle Arena, first one have 68 Metacritic score second one have 63 Metacritic score.
I did look Metacritic and Wikipedia maybe i should give names of the games in my original post.
Perhaps your argument should be, they only have one IP/franchise, rather than one game.