I hate the pregnancy test version. Every time there's an article or something about doom running on stuff, someone will always comment about the version that runs on a pregnancy test, when no, it didn't, the only thing that is still the pregnancy test is the plastic shell. All the internals were replaced
My favorite memory of playing Doom on a not-PC was when I jailbroke my iPod video and installed Rockbox on it, which could run Doom.
I used it to kill some time on a long-haul school trip from New England to Disney in Florida, a ~24 hour bus ride. Not for very long though, Rockbox and especially Doom wasn’t very kind to the battery.