The first google hit for "list of tetris variants" is Wikipedia: http://en.wikipedia.org/wiki/List_of_Tetris_variants http://en.wikipedia.org/wiki/List_of_Tetr

The first google hit for "list of tetris variants" is Wikipedia: http://en.wikipedia.org/wiki/List_of_Tetris_variants http://en.wikipedia.org/wiki/List_of_Tetris_variants You scroll down that list and try as many variants as possible. Maybe even keep a checklist of ones you have seen and a journal recording your findings. Basic research, you might even become an expert on Tetris; it's very easy to become an expert on something that you love, btw ;-)