I bet it's not only games but any commercial releases. They would be pretty stupid if they give it away for free.
Anyway, there are a couple of AAA Game engines that can be used for game releases under license. That's the idea of a game engine: The dev team releases a reference game and then sells licenses. Currently the best engines cost around 0.5 to 1.5 million $ per game release.
So you see, you only need to make something equally nice in blitz and there you go.
What your teacher does sounds pretty illegal, but who cares.
Anyway, there are a couple of AAA Game engines that can be used for game releases under license. That's the idea of a game engine: The dev team releases a reference game and then sells licenses. Currently the best engines cost around 0.5 to 1.5 million $ per game release.
So you see, you only need to make something equally nice in blitz and there you go.
What your teacher does sounds pretty illegal, but who cares.