Tim Cook answered
The Witcher series comprises the 2007 release The Witcher, its sequel The Witcher 2: Assassin of Kings (2011) and the forthcoming The Witcher 3: Wild Hunt, due for release in February 2015.
The developers of the Witcher series are a Polish company named CD Projekt, formed in 2002 by Marcin Iwinski and Michal Kicinski. CD Projekt have two other games currently in production: Cyberpunk 2077 and They. The first two games in the Witcher series have sold over 6 million copies, making CD Projekt RED among the most respected RPG videogame developers in the world. The company employs over 230 world-class GFX artists, animators, programmers and designers, both Polish and foreign. The Witcher 3: Wild Hunt will feature a new game engine designed by CD Projekt specifically for the new game.Did You Mean Who Published, Rather than Developed, the Series?
In North America, the publishers of the first two Witcher adventures were the legendary Atari, Inc. The third game is being developed by Warner Brothers Interactive Entertainment.
If you'd like a sneak preview of The Witcher 3: Wild Hunt, take a look at this demo unveiled at GamesCon 2014: