Op4

What is Op4?

OP4 stands for Opposing Force, the first and most popular expansion pack for Half-Life.

EdrianShepperdBoi - Wen is OP42 comeing out? Coz I kno thet the gman kept Shepperd coz he riminded him of him lol.

W.w.r.h.d.

1. "What Would Russ Hudson Do?". You typically ask yourself this question when at a crossroad or any other type of quandry, and i..

Yi Jianlian

1. Yi Jianlian is the most agile 7 foot power foward in the NBA. He is one of the best rookies in the league. Doesn't put up extreme n..

Uncle Roy

1. "Uncle" Roy Washington A favortite character created by the users of now dead Dysfunctional Family Circus. Uncle Roy was des..

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Op4 Edit Meaning