GSC Game World
GSC Game World is a Ukrainian video game developer based in Kiev. Founded in 1995 by Sergiy Grygorovych, it is best known for the Cossacks and S. T. A. L. K. E. R. series of games. GSC temporarily disbanded in December 2011, cancelling S. T. A. L. K. E. R. 2, before it reformed in December 2014.