It is with the double shotgun. That's why you take it, really. Using one of those as your main weapon is pretty nice. Splatters basically anything up to an Arachnotron in no more than two hits if you're close enough, and anything that's too far away can eat your rocket/BFG. You never have to worry about ammo, it always hits, you can take on a whole room full of crap at once. Good stuff. But without Shottyman, it's basically impossible, because reloading is SLOW and you're just standing there getting ventilated the whole time when you could be ducking in and out of a doorway, or jinking across the room.
My first win ever (in 987, I had some wins on an earlier version that was very different, too) was a shotty run. It works.
