Red River - Operace Flashpoint:

It remains the final entry in the franchise developed by Codemasters.

The original Operation Flashpoint was developed by Bohemia Interactive, who later reclaimed the rights and re-released the original game as Arma: Cold War Assault in 2011. Operace Flashpoint: Red River

The game takes place in a fictionalized 2013 conflict in Tajikistan, where U.S. Marines intervene in a civil war that eventually draws in the Chinese People's Liberation Army. It remains the final entry in the franchise