Crytek GmbH is a German video game developer and software developer based in Frankfurt. Founded by the Yerli brothers in Coburg in 1999 and moved to Frankfurt in 2006, Crytek operates additional studios in Kyiv, Ukraine and Istanbul, Turkey. Its former studios included Crytek Black Sea in Sofia, Bulgaria, Crytek UK in Nottingham, and Crytek USA in Austin, Texas. Crytek is best known for developing the first instalment of the Far Cry series, the Crysis series, and the open world nature of their games which showcase the company's CryEngine.