PDF engines that power browsers like Chrome and Firefox actually support a limited set of JavaScript commands. Rinsma realized he could exploit this to cobble together a basic game like Tetris ...

It doesn't give you total control over the PDF, but it gives you enough to work out how to play Tetris on it. And yes, before you ask, Thomas got an ASCII version of Doom running on it, too.

Thomas Rinsma, a security analysist and developer, published a working demonstration of the classic puzzle game Tetris running entirely in a PDF. It’s playable in Google Chrome and other ...

Recap: Early last month, someone used the PDF format's JavaScript support to run Tetris inside what should normally be a static text document. Predictably, within days, a high school student ...