Is this one of the smallest playable DOOM devices?
blog.adafruit.com
blog.adafruit.com
Using both seems like timidity.
*Edit*
it looks like it is using a clone of Doom called PrBoom so the system requirements of the original would not apply. Kind of misleading but my eyes are so bad I probably couldn't tell the difference between Doom or Pong on a 1.3" screen anyways!!!