
While it was The Witcher 3: Wild Hunt that brought CD Projekt RED worldwide fame, the studio had already created a brace of The Witcher games before then, with the original monster-slaying RPG of the trilogy released back in 2007.
The Witcher was built on BioWare's Aurora Engine, which was most famous at the time as the engine that powered the studio's own Neverwinter Nights series of fantasy RPGs. By using this engine The Witcher let players jump into the superhuman shoes of Geralt of Rivia in a story that, in the wider Witcher Saga timeline, takes place roughly five years after The Lady of the Lake, Andrzej Sapkowski's fifth book.