Creative Assembly Sofia (formerly Black Sea Studios Ltd. and later Crytek Black Sea Ltd.) is a Bulgarian video game developer based in Sofia. The company was established by Vesselin Handjiev as Black Sea Studios in 2001. The company is best known for its 2004 title Knights of Honor, a historical real-time strategy game released for Microsoft Windows, and for the 2008 science fiction real-time strategy title WorldShift.

In July 2008, German developer and publisher Crytek announced their acquisition of the studio, and renamed it Crytek Black Sea. In May 2014, Crytek announced the development of their own multiplayer online battle arena game using the CryEngine, titled Arena of Fate and under development at the Sofia studio. The game was shown at E3 2014.

In December 2016, Crytek announced that it would shut down five of its international studios, due to financial troubles, of which Crytek Black Sea was put up for sale. In March 2017, it was announced that the studio was acquired by British developer Creative Assembly (itself owned by Sega), and was renamed Creative Assembly Sofia.