Valve Archive - Half-Life: Opposing Force
⬅ Half-Life Expansions

Half-Life: Opposing Force

The first in a series of expansion packs for the original game, Half-Life: Opposing Force was released in stores a year after Half-Life on November 19, 1999. Developed by the newly-formed Gearbox Software, who would also create the subsequent expansions, the title returned players to Black Mesa into role of one of the invading soldiers, providing another perspective to the story in one of the several projects to expand the Half-Life universe.