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From Wikipedia:
Close Combat: First to Fight is a squad-based military first person tactical shooter video game created by Destineer Studios for Microsoft Windows, Macintosh and Xbox. It was released in April 2005. The player commands a fireteam of three U.S. Marines in a realistic fictional, scenario where the United Nations sends Marines into Lebanon when their Prime Minister falls ill and Syria and Iran send forces to bolster certain factions.
The game features a psychological model for every AI character, including enemies, civilians, and team members. No two games should play the same due to the variability of the simulated human reaction to stress.
It was designed with input from active-duty and retired Marines from 3rd Battalion 1st Marines, who recently participated in combat around Fallujah, Iraq during Operation Phantom Fury that became known as the Second Battle of Fallujah.
The game was later ported to the Wii as Marines: Modern Urban Combat.[3]