The enduring quest to make classic shooter Doom run on anything comes full circle, with the original Doom now playable in...the original Doom.
We've seen Doom run on anything from an oscilloscope to a Zune, but YouTube modder TheZombieKiller has gone all meta on us, putting an ickle arcade machine inside the GZDoom port of Doom which lets you play Doom on a little screen within your screen.
Things go to an even more brain melting level of Doomception when you realise that you can find your first Doom avatar within the arcade machine version. And shoot it. At which point you both die. Deep. Bet the new Doom reboot doesn't offer any existential crises like this. [YouTube]