Ignoring the rather pathetic movie featuring "The Rock", DOOM's 13th Birthday was yesterday (11-Dec-2006). Honestly I'll admit I was never hooked on DOOM, rather QUAKE was my first addiction to FPS games. Quake, Quake CTF, and Quake II wasted many a day during my college career (though I'm no worse of for having played till my hands went pins-and-needles on a few occasions....at least not that I know of so far).
DOOM 13th BDay on theRegister
Doom @ IDSoftware.com