Steam game

Half-Life: Opposing Force

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

$4.99 November 1, 1999

By Gearbox Software

FPS Action Classic Sci-fi Singleplayer

Windows macOS Linux

View on Steam

Half-Life: Opposing Force - Gearbox Software. Popular. Released November 1, 1999

Screenshot of Half-Life: Opposing Force gameplay showing in-action mechanics

Screenshot 2 of Half-Life: Opposing Force - additional gameplay view

Screenshot 3 of Half-Life: Opposing Force - more gameplay footage

Screenshot 4 of Half-Life: Opposing Force - final gameplay screenshot

Overview

About this game

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

Quick facts

At a glance

Developer: Gearbox Software
Price: $4.99
Release: November 1, 1999; Released 26 years ago; on a Monday; 9726 days since release
Last updated: April 23, 2025
Steam App ID: 50
Popularity: Popular

Is this your game? See advertising options.

Studio lineup

More from the same developer

More

Half-Life: Opposing Force

About this game

More from the same developer

Borderlands 4

Borderlands Game of the Year Enhanced

New Tales from the Borderlands

Tiny Tina's Wonderlands

Tiny Tina's Assault on Dragon Keep: A Wonderlands One-shot Adventure

Borderlands 3

Borderlands 2 VR

Penn & Teller VR: Frankly Unfair, Unkind, Unnecessary, & Underhanded

More free games like this

Counter-Strike 2

Call of Duty®: Warzone™

QontoWars

The Gauntlet

FPSCore

Culinary Mayhem

Dirty Room

Happy's Humble Burger Barn

Same tags, different developer

Counter-Strike 2

Hand Meat Walker

Altered Priest

Call of Duty®: Warzone™

Call of Duty® (2003)

Ratz Instagib

Half-Life

Half-Life 2

Similar games

Half-Life: Blue Shift

Brothers in Arms: Earned in Blood™

Borderlands Game of the Year Enhanced

Brothers in Arms: Road to Hill 30™

Borderlands 2

Brothers in Arms: Hell's Highway™

Borderlands 2 VR

Homeworld Remastered Collection