Opposing Force

Half-life Opposing Force was Realesed in 1999
And was Game of the Year 1999.
It follow's the Story of Corporal Shephard Who is A Soldier in the U.S. Marine's.
He is after Dr. Gordon Freeman Along with his other Troops, After facing a Devestating Crash Shpehard is alone And must Fight New and Old Monster's With New and Old Weapon's.
It is One of the Greatest Half-Life 1 Game's of All time.