These days you can run Doom anywhere on just about anything, with things like porting Doom to JavaScript these days about as interesting as writing Snake in BASIC on one’s graphical calculator.

Using Emscripten, a compiler that compiles C and C++ source code to WebAssembly, they compiled Doom to asm.js, a subset of JavaScript. In short, it's how ading.dev got Doom running in a PDF.

Here at Ars, we're suckers for stories about hackers getting Doom running on everything from ... Adobe Acrobat included some robust support for JavaScript in the PDF file format.