supercharged by none other than JavaScript. Here's a working game of Tetris inside a PDF. Even has keyboard controls (by typing WASD in an input box). Plus, upon game-over you can "save" your ...

Tetris in PDF is an unexpectedly enjoyable game that uses simple controls ... Chrome or Firefox allows PDFs to run in a JavaScript sandbox, enabling unique projects like PDFTris.

Tetris exploded in popularity after a race in the 1980s to secure global rights for the Soviet-made video game, a tale retold in a new movie. It is still captivating minds decades later.