 TORONTO, July 19, 2021 PRNewswire - Golden Star Resources Ltd. NYSE American: GSS TSX: GSC GSE: GSR Golden Star or the Company announces that Future Global Resources Limited FGR has defaulted on its obligation to pay the Companys wholly-owned subsidiary, Caystar Holdings Caystar, 15 million of the purchase price relating to the sale of Golden Stars 90 interest in the Bogoso-Prestea Gold Mine to FGR under the share purchase agreement dated July 26, 2020, as supplemented by a letter agreement dated September 30, 2020, and amended by a first amending agreement dated March 28, 2021 and a second amending agreement dated May 31, 2021 collectively, the Share Purchase Agreement. 