This Operation Flashpoint: Red River trailer is titled 'Shifting Focus' and shows more of the games' back-story a US Marines end up having to take on the Chinese army in Codemasters' shooter sequel that's due on April 21st.

The in-game footage demonstrates how the might of the PLA, with vehicles, air support and state of the art weapons, presents a wholly different tactical challenge from insurgent fighters waging war from the shadows. "Now the men pointing the guns and artillery at the Marines have uniforms. They are organised and centralised. The PLA wield undeniable might in Tajikistan."

Marines are shown engaging the PLA at close quarters, long range and in deadly night battles as they are "confronted by a foe equal in technology but vastly superior in numbers." The PLA are disciplined, determined and well-equipped. It is not the war the Marines wanted but the war they must fight, and they must reassess and adapt in order to survive.