Set in the same time frame as the original game, you now play one of the army grunts sent to eliminate Gordon Freeman when you realize that he is the least of your worries. Now, you must fight though the Black Mesa facility and face the alien invasion if you want to get out alive.
Half-Life: Opposing Force - walkthrough
Play as Adrian Shephard, a HECU soldier assigned to kill the Black Mesa personnels, especially Gordon Freeman. But, the assignment may not be easy as he thought.
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