In F.E.A.R An unidentified paramilitary force infiltrates a multi-billion dollar aerospace compound, taking hostages but issuing no demands. The government responds by sending in special forces, but loses contact as an eerie signal interrupts radio communications. When the interference subsides moments later, the team has been obliterated.
This will remove the enemy conversation sounds from the game. Make them seem more like tactically trained soldiers (ie solely using subtle hand gestures instead).