I was lucky to get the chance to speak about 20 min with Alexey Pajitnov, the creator of the Tetris. Obviously I asked him if the rumor about Robert Stein and the unicensed Megadrive Tetris was real, he told me yes (thanks to god!) also told me that was a long time ago and he would not want to talk about it in the conference.
Here is a pic of the Jornadas Mundocombo, where Alexey was answering questions about Tetris and himself for aprox 2,5 hours.
At the end, he accepted to sign my MD Tetris :)
I only have to say thanks Alexey, for your simpathy and your contribution to the industry of videogames.
I thought some of you could find interesting this information, now I think we can be sure about this game is not a fake.