Thread:Deathstalker666/@comment-1496755-20151224121621/@comment-3547390-20160403211325

Well, beyond the Doom bible and a few levels, it seems Tom Hall's stuff remained in play. He didn't have E1M4's locker rooms or those two random levels, but he did get quite a few of his levels in the final product. Plus flying enemies and teleporters are basically due to him. Also, as I said, the whole issue with enemies using pistols (the marine and former humans) but holding rifles apparently stems back to 0.4. I guess this is an instance where a lot got added, but a lot did not.

I guess they liked Sandy Petersen's design a lot, practically 2/3 of the original game was made by him or he modified from the Tom Hall versions. I do like some of the levels Petersen came up with, he tends to be a designer who experiments and comes up with either great levels or terrible levels. He definitely is an extremist though, his levels are never just mediocre.

Me being a person that prefers FPS over RPGs, I am happy that Doom went the way it did. Hooray for id Software's laziness, it gave us Doom and Quake!