There's a long-running joke around playing DOOM on strange devices. Fans of the iconic first-person shooter have fired it up on everything from calculators to pregnancy tests since the source code was ...

WTF?! Modders repeatedly prove that Doom can run on anything with a screen. However, most hacks involving the game simply transfer its classic gameplay and graphics to new devices without any changes.

Leenheer is best known for creating HTML5test.com, the WhichBrowser user-agent parser. He began exploring a CSS-based Doom ...