Half-Life: Opposing Force is an expansion pack for Valve's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and Valve and published by Sierra On-Line on November 19, 1999. Opposing Force is the first expansion for Half-Life and was 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, is sent in to neutralize the Black Mesa Research Facility when a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units.
Opposing Force was received well by critics, many describing it as the new benchmark title for expansion packs, in a similar fashion to how Half-Life revolutionized the first-person shooter genre. Other reviewers, however, thought that the game still had many of the negative aspects of other expansion packs, although it was still regarded as an exceptional add-on.
As an expansion pack for Half-Life, Opposing Force is a first-person shooter. The overall gameplay of Opposing Force does not significantly differ from that of Half-Life. Players are required to navigate through the game's levels, fight hostile non-player characters and solve a variety of puzzles to advance. The game continues Half-Life's methods of an unbroken narrative. The player sees everything through the first person perspective of the protagonist and remains in control of the player character for almost all of the game.
Screenshots from the game Half-Life: Opposing Force
System requirements Half-Life: Opposing Force for Mac Os:
- OS X Snow Leopard 10.6.3
- 1 GB RAM
- 4 GB Hard Drive Space
- NVIDIA GeForce 8 or higher, ATI X1600 or higher, or Intel HD 3000
- Make sure that the system is allowed to run any applications and SIP is disabled.
- Mount the .dmg image by double-clicking on it.
- Wait for the system to verify its integrity.
- Drag the game icon into the Applications folder.
- Wait for the copy to finish.
- The game icon will appear in Launchpad, from where it can be launched.