Half-Life: Opposing Force – Game Overview, Platforms & Release Info

Half-Life: Opposing Force gameplay screenshot

A 1999 classic, Half-Life: Opposing Force blends Platform, Puzzle, Shooter mechanics into a massive open-world experience. Supported on Linux, Mac, PC (Microsoft Windows), the game still holds strong popularity in 2026.

❓ Is Half-Life: Opposing Force still worth playing in 2026?

Yes. Half-Life: Opposing Force remains worth playing in 2026 thanks to its engaging gameplay systems, memorable experience, and continued interest from the gaming community. Even years after release, the game still offers solid entertainment for both returning players and newcomers.

⭐ 79.75 394 user ratings

🎮 About Game

🎮 Genre: Platform, Puzzle, Shooter

🕹️ Platform: Linux, Mac, PC (Microsoft Windows)

🗓️ Release Date: 10 Nov 1999

🗓️ Last Updated Date: 31 May 2026

🧩 Keywords: A.i. Companion Alien Invasion Alien Languages Aliens

👤 Game Modes: Multiplayer, Single player

📝 Description

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.