


After his transport aircraft is shot down and he is cut off from the rest of his unit, the clean-up mission is abandoned and Shephard joins forces with the scattered survivors seeking escape.Īs the tide of the furious battle begins to favor the alien army, Shephard realizes the military forces have been ordered to pull out. As the game begins, Shephard is part of this operation. Responding swiftly, the United States military initiates a massive "clean-up" operation to eradicate the alien presence at Black Mesa as well as "silence" any witnesses. The surviving scientists and security guards at the facility struggle to escape. In the original Half-Life, a "resonance cascade" opens an extra-dimensional rift, allowing an alien army to invade Black Mesa. The action of Opposing Force cleverly interweaves with the original events of Half-Life, so that the player occasionally catches glimpses of Gordon Freeman, the player character from the original game, and visits some recognizable locations.

Spoiler warning: Plot or ending details follow. Shephard is sent into the huge underground Black Mesa Research Facility on an undisclosed mission, but things go wrong and he finds himself fighting for survival against sinister government agents and monstrous aliens. The expansion's single-player mode features the same setting as the original, with the "twist" that the player is cast not as Gordon Freeman, but as Corporal Adrian Shephard, a United States Marine.
#HALF LIFE OPPOSING FORCE GUIDE SOFTWARE#
Half-Life: Opposing Force (or OpFor) is a critically acclaimed expansion pack for the popular first-person shooter Half-Life, developed by Gearbox Software and released by Valve Software on October 31, 1999. Template:If defined call1 Template:If defined call1 Template:If defined call1 Template:If defined call1 Template:If defined call1 Release date(s)
