iRankGames
Half-Life: Opposing Force

Half-Life: Opposing Force— Genres, rating & game data

Half-Life: Opposing Force is an expansion pack for the original first-person shooter Half-Life. The game setting is the same as the one in the original game: the story takes place in the science laboratory called Black Mesa Research Facility in New Mexico at the same time. However, instead of following the original characters, players are offered to assume the role of Adrien Shephard a Hazardou…

Half-Life: Opposing Force is a shooter game developed by Gearbox Software, 1999. It stands out for narrative-driven gameplay, ranged combat and a sci-fi setting. Available in single-player and multiplayer mode. With an iRank Score of 84/100, it ranks as a highly rated title in our catalog.

About Half-Life: Opposing Force

Half-Life: Opposing Force is an expansion pack for the original first-person shooter Half-Life. The game setting is the same as the one in the original game: the story takes place in the science laboratory called Black Mesa Research Facility in New Mexico at the same time. However, instead of following the original characters, players are offered to assume the role of Adrien Shephard a Hazardous Environment Combat Unit (initially antagonist organization) operator, who is sent to Black Mesa to prevent an extraterrestrial menace. Nevertheless, shooting scientists is not required, as the main threat comes out of aliens. The overall gameplay has few differences comparing to the one existing in Half-life, as far as it is based on completing the sequence of levels. Although the combat system looks almost the same, it features the non-player character’s assistance so the protagonist will receive support from scientists, security guards, and marines (soldiers, combat medics, and engineers) during firefights or while solving puzzles. Players will also face new aliens types added to the existing ones.

iRank Score

84/100 ↗

Rating

👍 80%

750 votes

Type

Shooter, FPS, Puzzle

Released

1999

Updated July 2026

Developer

Gearbox Software

Publisher: Valve

Avg. playtime

~3h

Platforms

PC, Apple Macintosh, Linux

Official trailer for Half-Life: Opposing Force

Screenshots of Half-Life: Opposing Force

Half-Life: Opposing Force screenshot 1
Half-Life: Opposing Force screenshot 2
Half-Life: Opposing Force screenshot 3
Half-Life: Opposing Force screenshot 4
Half-Life: Opposing Force screenshot 5

Looking for games similar to Half-Life: Opposing Force?

We've ranked 64 similar games using 16 gameplay attributes.

Find similar →

Genre rankings

See full ranking →