June marks the 30th anniversary of Tetris, one of the most iconic and, let's face it, addictive video games of all time. Since launching in 1984, it’s gone on to shape the mobile gaming world and became instrumental in the Nintendo Game Boy’s runaway success—it’s sold roughly 143 million copies worldwide. To celebrate, we went full-gamer nerd and dug up a few juicy bits of history you may not have known about the world’s favorite falling block bonanza. Eleven of them, actually. Enjoy.