The game utilizes BioWare's proprietary Aurora Engine. The game's system of moral choices as part of the storyline was noted for its time-delayed consequences and lack of black-and-white morality.
The story takes place in a medieval fantasy world and follows Geralt of Rivia, one of a few traveling monster hunters who have supernatural powers, known as Witchers. The Witcher ( Polish: Wiedźmin (Warlock)) is a 2007 action role-playing game developed by CD Projekt Red for Microsoft Windows and CD Projekt on OS X, based on the novel series of The Witcher by Polish author Andrzej Sapkowski, taking place after the events of the main saga.