I write games as well (Written more than 10 games, though they are not very large at scale) and I write them in C++. Reasons being writing networking code (TCP/UDP) is much easier & efficient in C/C++ than any other language IMHO. And most of the code works across platforms.
Just my 5 cents: Although there's nothing wrong with it in the context of your comment alone, C and C++ are so distinct languages it's weird to see them aggregated as "C/C++" given that the article is about C and it explicitly recognizes C++ as a bad alternative.