The Witcher is an action role-playing game developed by CD Projekt Red and published by Atari, based on the novel series of The Witcher by Polish author Andrzej Sapkowski. 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 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 game utilizes BioWare's proprietary Aurora Engine. A console version was to be released in late 2009 using an entirely new engine and combat system and entitled The Witcher: Rise of the White Wolf; it was suspended, however, due to payment problems with console developers Widescreen Games. Two sequels were released: The Witcher 2: Assassins of Kings in 2011 and The Witcher 3: Wild Hunt in 2015.