In the story the lesser evil Geralt has a killed Kikimora. It was not said that and how he killed it, but the Netflix show will take its freedom and show the fight.This is not a scene from the books. Lesser Evil begins with Geralt already dealt with the kikimora. But visually it looks like a scene from the games.
The Netflix show is not about the games.
(edited it, sounded weird by reading it again XD)