If Ultima Underworld was not the first smooth scrolling first person perspective 3D game then what was? It is so fucking annoying when people make statements like that and then back them up with nothing. It is commonly and widely accepted that Ultima Underworld was first. Some people mistakenly believed that Wolfenstein 3D came before Ultima Underworld but you don't seem to. So exactly what game are you referring to?
While I apologize that I didn't provide documented and certified evidence to strengthen my statement, I must give a
at the underlined part of yours.
Ultima Underworld was released in March 1992. Wolfenstein 3D was released in May 1992. These are facts I'm not disputing.
However, more facts present the true picture: John Carmack of iD Software saw a Underworld tech demo sometime in late 1990/early 1991, thought "that's nice, but I can do better" and then went and did exactly that.
He spent six weeks researching the engine, and the first game to use that engine was released sometime in 1991 called
Hovertank 3D.
Later iD Software released
Catacomb 3D in November 1991.
Wolfenstein 3D uses the same engine as these two games.
So Carmack, starting later than Blue Sky Productions, still managed to be quicker than them to release a smooth-scrolling 3D engine utilizing the first-person perspective. (He managed to do that by skimping out on the z-angle, but that's already been said.)
And that's just to settle the Wolfenstein argument. As
V_K pointed out there are other games that did the same before both of them. The
Midwinter games, the
Mercenary game series,
Cybercon 3 and
Interphase, and if the machine running them was powerful enough the games made on the Freescape engine (six in total) also qualify. That's roughly a dozen games named right here, and I'm certain when I say there's probably another dozen out there that fit the bill.
Ultima Underworld wasn't the first, but it was still an important milestone on the path.