It's possible to make a videogame in a library like QT instead of using a game engine?

fat grumpy old daigo will be posted

Kill yourself Cris.

Of course it's possible, but you know, it's suitable for games of the sort of Aurora 4X or Rule the Waves. In a pinch you could use it to e.g. make a roguelike, but frankly, a text terminal library like nCurses is more convenient for that. Or of course you could use QT to create the windows, etc, and then write the graphics stuff etc. entirely by yourself. But then it that case you'd also be better-off with, say, SDL.