There are a few exceptions though, like most mobile games, visual novels (many of which use Python of all languages, due to an excellent framework called ren'py), and of course games written using Unity or XNA, which use .NET languages.
Also, three decades is going a bit too far back, I think. In the mid nineties, C was still king, with assembly still hanging on. C++ was just one of several promising candidates, with some brave souls even trying Java.
