It was quite the divisive title when it released. It released to mostly positive reception but in much the same way that Shadow of Chernobyl split the gaming community, Clear Sky managed to tear the S.T.A.L.K.E.R. Following the success of the amazing S.T.A.L.K.E.R.: Shadow of Chernobyl, GSC Game World started work on a prequel game – S.T.A.L.K.E.R.: Clear Sky.