In the past, hackers have used this little-known Adobe feature to code simple games like Breakout and Tetris into PDF documents. But ading220 went further, recompiling a streamlined fork of Doom 's open source code using an old version of Emscripten that outputs optimized asm.js code.

Rinsma explained that it’s already “relatively well-known” that PDFs can support a number of features such as dynamic content scripting when opened in something like Adobe Acrobat/Reader. Some of that same scripting support, however, is also available in both Mozilla Firefox and Google Chromium ’s respective PDF readers, PDF.js and PDFium.

A high school student found a way to run the classic PC game Doom from within a PDF file by leveraging the format's support for JavaScript and the Chromium browser engine.

Github user ading2210 /vk6 has developed an unusual port of Doom. You can play it on its official website which, of course, is just a PDF file that can be downloaded on your system. It continues a long tradition of creative Doom ports, further enriching its historic legacy

The iconic 1993 game Doom, known for being the world's most ported game, has found its way into a PDF document.

However, modern browsers can unlock more features for PDF documents, as proven by new ports of Tetris and DOOM. Thomas Rinsma, a security analysist and developer, published a working demonstration of the classic puzzle game Tetris running entirely in a PDF.