(Image credit: Bethesda Softworks) Today is the 10 th anniversary of Doom—not the 1993 classic that changed the world, but the 2016 reboot that proved to be far better than I'd dared to hope. We celebrated the big birthday by confirming with Doom co-creator John Romero that Doom Guy was not intentionally rocking a sexy tummy window , but had in fact had his shirt torn open by the legions of Hell. Why did we do this? Because we're PC Gamer and we do whatever the hell we want, that's why. Others have apparently chosen to mark the memorable moment in more conventional ways—such as Doom overlord Bethesda Softworks, which has marked that great shooter down to just $2/£1.59/€2 on Steam , 90% off the regular price. Doom is, to be clear, well worth that regular price—as a stand-up, balls-out, rip-and-tear killfest, there are very few better—so for $2, it's an absolute steal.…