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 also operates further 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 and the Crysis series, the open world nature of their games which showcase the company's CryEngine, and for pushing the limits on PC specifications to achieve advanced graphics and gameplay.