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.

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 ...

Turns out, they create a sandboxed Javascript runtime ... It even had a scrolling "Tetris" word that started off the game. While it's no longer possible to play Tetris on the side of an MIT ...