GE uses C, but with a few features added, so I suggest you use GE to develop a new game. Make a platformer, RPG, strategy game, WHATEVER with GE! BTW: Welcome to the forums!
honestly most major computer and video games have been made with c++. Windows vista and windows 7 both made with c+++.Xbox and playstation games are made with c++. So learn that langauge and also a new language comming out in the future called D language, there is only one compiler for it but its the langauge of the future.