>first FPS with true 3D graphics
>first deathmatch over modem
>first game with a modding community
>first game to be speedrun
Is there anything Doom can't do?
Ultima Underworld came out before Wolfenstein 3D and I don't know much about what's meant by "true 3d" but to my knowledge it was "truer" 3d than DOOM, like you could jump and shit.
I guess it's not a shooter but it's worth checking out.
It's pretty cool
>Ultima Underworld's game engine was written by a small team. Chris Green provided the game's texture mapping algorithm, which was applied to walls, floors and ceilings. The engine allowed for transparencies, walls at 45 degree angles, multiple tile heights and inclined surfaces, and other aspects. Ultima Underworld was the first video game to implement many of these effects. The game was also the first indoor, real-time, 3D first-person game to allow the player to look up and down, and to jump.
>Ultima Underworld uses two-dimensional sprites for characters, but also features 3D objects, as the team believed that it "had to do 3D objects in order to have reasonable visuals". The game uses physics to calculate the motion of thrown objects. During the game's alpha testing phase, part of the programming team worked to create a smooth lighting model. The game's advanced technology caused the engine to run slowly, and its system requirements were extremely high. Doug Church later downplayed the importance of the game's technology, stating that technological advancement "is somewhat inevitable in our field ... [and] sadly, as an industry we seem to know much less about design, and how to continue to extend and grow design capabilities". Instead, he claimed that Ultima Underworld's most important achievement was its incorporation of simulation elements into a role-playing game.