Sgt. Kamarov is first met in the mission "Blackout" in Call of Duty 4: Modern Warfare where the S.A.S. are tasked with escorting Nikolai. He is introduced as a commander of Russian forces still loyal to the government being attacked by the Ultranationalists which are lead by Imran Zakhaev. Later Kamarov is the man who rescues Soap and Price after their final confrontation with Imran Zakhaev. Following the events in Call of Duty 4 the condition and location of Kamarov is unknown as the Ultranationalists are said to have won the Russian Civil War in Modern Warfare 2.
He is the announcer for Spetsnaz forces in the multiplayer for Call of Duty 4.