On game programming it's difficult to stick with C but otherwise it's no problem.
Lemmings was C as was the original Doom, well the core code of it was anyway. But I do agree, You looks at the gamedev site and even then the reviwers of game programming languages tend to lean more towards C++. its the way it is now, the OOP capabilities of it make game programming faster and more efficient. Although you can do OOP in C.