Heroes... Heroes is one of the earliest Ultimate Doom megaWADs, but it isn't an entirely original endeavor. The archiver, Al Dewey, curated most of these levels as the cream of his crop and took care modifying and expanding them. Judging from rough comparisons and the end product I believe that most if not all alterations were for the better. I'm not knocking the originals, though; Dewey wasn't in the business of slapping together a bunch of stuff as was popular back in the day when people just wanted to play entire episodes of Doom. WADPAK, EPIBEST, the list goes on and on. Heroes has the distinction of being somewhat canonized, a lot of which I'm sure has to do with Dewey's consideration when putting this whole thing together. Of all the compilations I've seen his has certainly been the most lauded.
