The narrative of Opposing Force runs parallel to the events of the original Half-Life . Your mission starts mid-flight inside a military helicopter, which is suddenly shot down by alien bioweapons. Waking up in a destroyed sector of Black Mesa, Adrian Shephard finds his squad wiped out and the facility in complete chaos.
Access heavy military weaponry, including the M249 SAW and sniper rifle.
Your mission? Initially, it’s to cover up the incident at Black Mesa by silencing the scientists. However, things quickly go south. You find yourself cut off from your squad, fighting for survival against not only the alien invaders from Xen but also a mysterious "Black Ops" cleanup crew. It is a masterclass in expansion design, offering a parallel story that runs concurrent with the events of the original game.
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