: Most "No-Steam" cracks for the modern version work by replacing the steam_api64.dll
Ensure the files were installed into the sourcemods folder. If they were put in a subfolder (e.g., sourcemods\Black Mesa\BMS ), Steam won't see them. Move them directly to sourcemods\BMS .
While the Definitive Edition is a paid, high-quality product, the 2012 mod is free. How to Install the 2012 Non-Steam Version
The search phrase you are using is a prime target for cybercriminals. Because Black Mesa is incredibly popular, malicious actors set up fake blogs and automated forums optimized for keywords like "crack only top." 1. High Risk of Malware and Trojan Horses