

Installing Opposing Force automatically patches Half-Life to version 1.0.1.5. Some areas of the game can only be completed with the squadmates' help. There are new weapons and new enemies: Zombie Grunt, Pit Drone, Shock Trooper and Voltigore, plus some new boss creatures.Īnother new feature is the ability to command AI-controlled teammates, belonging to different classes: standard grunts and heavy gunners can be called upon for support fire, engineers can cut through doors and medics can restore lost health. The expansion pack consists of 12 new interconnected "levels".

The add-on uses the same style of storytelling as Half-Life: everything is seen from the eyes of the protagonist. Opposing Force takes place concurrently with Half-Life, and Shephard will witness some of the same events (though from a different perspective) and visit some of the same places as Half-Life's protagonist Gordon Freeman did in the original game. Shephard never reaches his final destination, though: his helicopter is shot down, his squad killed, and he finds himself in a battle for survival against the invading aliens. The storyline of the base game is interwoven into the add-on, as players take on the role of Corporal Adrian Shephard, one of the soldiers sent to the Black Mesa facility to "clean up" the incident and silence any witnesses. Opposing Force is the first official expansion for Half-Life, developed by Gearbox Software under the supervision of the original creator Valve.
