The Raspberry Pi is a great little device, one that got better with the release of its speedier successor. The original is still excellent though and with some determination, it can even be rejigged as a dedicated Doom machine, complete with custom-made controller.
Student Csongor Kiss from the UK's Imperial College London decided to whip the project together as part of his computing class, which demanded the creative application of ARM hardware.
Kiss calls it a "bare metal replica", as the version of Doom you see being played was not only written from scratch specifically for the Pi, but he went to the trouble of building a controller for it, despite not being the most practical device in practise. He also coded it in assembly, an impressive feat by itself.
Sure, it's not something you'd go out of your way to make (or play), but it's good to see education and gaming coming together as one.