Opposing Force 4.1.1.1

Opposing Force is a first-person shooter video game developed by Gearbox Software and published by Sierra Entertainment. It was released in 1999, as an expansion pack to the popular game Half-Life.

The game takes place during the same time period as Half-Life, but from the perspective of a different character, Corporal Adrian Shepard. The story begins with Shepard being sent into the Black Mesa Research Facility, on a mission to eliminate any witnesses to the events that had taken place there. However, things quickly go awry and Shepard finds himself fighting for his survival against not only aliens and monsters, but also against the military forces sent in to cover up the disaster.

Opposing Force introduces several new weapons and enemies, as well as new multiplayer modes. It received positive reviews for its engaging storyline, intense combat, and innovative gameplay features. The game was also praised for its use of scripted sequences and interactive environments, which helped immerse players in the game's world.

• New weapons include the shock roach and remote-controlled snarks
• New enemies include female assassins and friendly fire incidents with marines

Opposing Force was well-received by fans of Half-Life and first-person shooters in general. It remains a beloved classic for its compelling narrative, exciting gameplay, and challenging difficulty level.