Half-Life: Opposing Force cover

Half-Life: Opposing Force

Platform, Shooter, Puzzle · 1999

Today's price by store

StorePriceDiscountSale endsView in store
SteamR$17.99——View in store

Lowest price today: R$17.99 on Steam.

Prices updated on Nov 3, 2026. The store's price is the one that counts.

Lowest recorded price

R$17.99 on Steam, on Oct 17, 2026. It is the lowest price since Oct 17, 2026, when Game Fellow started tracking this game.

Price history (last 90 days)

  • Steam: R$17.99 today; low of R$17.99 and high of R$17.99 in the period.
R$0.00R$10.00R$20.00Oct 17, 2026Nov 4, 2026
  • Steamavg. R$17.99

Game details

Genres
Platform, Shooter, Puzzle
Platforms
Linux, PC (Microsoft Windows), Mac
Release
Nov 9, 1999
Developer
Gearbox Software
Publisher
Sierra Entertainment, Valve

About the game

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 after 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.

Summary from IGDB.

See also