by Mike Krumboltz Tetris is among the most famous, most successful videogame franchises of all time. The original, created in the '80s by Russian scientist Alexey Pajitnov , inspired countless sequels, unauthorized ripoffs, art exhibits , and even game shows . But through all the falling blocks, there has never been a truly satisfying way for more than one gamer to play at a time. Mr. Pajitnov aims to change that. In a fascinating interview with GamaSutra ,