Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and published by Sierra Entertainment on November 1, 1999. Opposing Force is the first expansion for Half-Life and was first announced in April 1999. Randy Pitchford, the lead designer on the game, later noted that he believed Gearbox was selected to develop Opposing Force because Valve wanted to concentrate on their future projects. Over the course of development, Gearbox brought in a variety of outside talent from other areas of the video games industry to help bolster various aspects of design. Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard.
A collection of some the best half life replacement models (Blue Shift,and Opposing force also) for the single and multiplayer games while trying to keep the Half Life feel and look intact. Replaces almost all the models with HD versions. Extract to your steam\steamapps\[username}\half-life directory. If you have the HD pack from steam installed you must uninstall it to see these. These came from other packs and single models I found and picked out the best ones (according to me lol) , this is part of a much bigger pack with texture replacements coming soon. Updated 7/31/2012 more updates and tweaks from me and kingennio. Suggestions welcome.