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Operation: Black Mesa - Relive the Black Mesa Incident

Operation: Black Mesa is a thrilling fan-made reimagining of Gearbox's classic Half-Life™: Opposing Force and Half-Life™: Blue Shift, bringing these iconic expansions to life with stunning detail and enhanced gameplay. Experience the Black Mesa Incident like never before in this ultimate Half-Life experience.

Two Unforgettable Single-Player Campaigns

Delve into two distinct, gripping single-player campaigns that unfold during the catastrophic Black Mesa Incident, a pivotal moment in the Half-Life™ universe. Step into the boots of Barney Calhoun, a Black Mesa security guard facing a day job spiraling out of control. Or, join Corporal Adrian Shephard of the Hazardous Environment Combat Unit (HECU) in a desperate fight for survival after a mission gone horribly wrong. Choose your playstyle in this action-packed first-person shooter.

Key Features That Redefine the Experience

• Two Extensive Single-Player Campaigns: Enjoy both Opposing Force and Blue Shift campaigns with expanded gameplay mechanics and captivating new content that enriches the original storylines.
• Visually Stunning Source Engine Enhancements: Witness the Source engine pushed to its limits with a plethora of graphical upgrades and cutting-edge effects, offering a truly immersive and visually striking experience.
• Intense, Fast-Paced Combat: Engage in heart-pounding combat against over 30 unique enemy types. Employ strategic thinking, quick reflexes, and precise shooting to survive the relentless onslaught.
• Diverse Arsenal of Over Eighteen Weapons: Experiment with a wide array of weapons, each suited for different play styles. Choose the perfect tools to tackle the dangers lurking within Black Mesa. A true FPS experience!
• Original and Immersive Music: Immerse yourself in two distinct soundtracks, each meticulously crafted to enhance the atmosphere and tension of their respective campaigns.
• Expanded Narrative and Lore: Discover deeper connections to the established Half-Life™ lore, enriching the overall narrative experience and providing new insights into the events of Black Mesa.
• Mod-Friendly Customization: Tailor the game to your preferences with a robust and mod-friendly set of tools, allowing you to create your own unique experiences with this open-world shooter.