The Source SDK is a software development kit compiled by Valve Corporation that is used to create games or mods for the Source engine. I downloaded and checked the project's source codes at the end of 2013 already and intended to write an article about it during the New Year holidays. But laziness prevailed over the craving for creativity, and I sat down to writing the article only on getting back to work. However, I doubt that the source codes have changed during this time. Now you are welcome to have a look at the suspicious code fragments found in the project code by the PVS-Studio code analyzer.