Operation Flashpoint: Resistance is an expansion pack to Operation Flashpoint: Cold War Crisis. It was developed by Bohemia Interactive, authors of the original game, and published by Codemasters. It is the second expansion of Operation Flashpoint, the first one being Operation Flashpoint: Red Hammer, which was developed by Codemasters. Resistance was later re-released as part of renamed ArmA: Cold War Assault.
The story takes place in 1982, three years before the events of Operation Flashpoint: Cold War Crisis. The player takes on the role of an ex-special operations soldier, Victor Troska, who joins and comes to lead a resistance movement fighting against the Soviet Army, which has invaded his country.