Marathon did this earlier.
and Corperation did it YEARS earlier on the AMIGA 5 years earlier to be exact.. the first 3D poly world in FPS type game.
threads like this are sorta silly.. the old saying "history is wrote by the winners' is true.
Warcraft/starcraft will be forever known as the RTS makers.. but DUNE II was argubly the first, but Herzog Zewi on the Gensis might be considered the ORIGINAL
Wolf3d- sorry.. no there was some Wizard games before it (kens lybrinth?)
WoW- this one is so wrong.. the first 3D online world would be Meridina 59 (sudo 3d) or true 3d Everquest.
Diablo- idea stole from crusader, which in trun stole from several earlier games Hemdail, Imortal, etc.. top down isometric real time games.
3vikings- gobbliiins
it really depends on how you see it.. harldy any game "KNOWN' as a first didnt steal some part of it from earlier stuff, but the succesfull are almost always seen as the Original as nobody gives credit to the no-names.
BLIZZARD one of the most succesfull game companies int eh world has NEVER had an original idea.. they are just damn good at taking existing ideas and makeing them great.. nothing wrong with it.. but those original people deserve some credit..
take a look at APPLE.. suing for the PINCH... hell I saw that crap in Johnny Menomic the movie years before Apple ever did it.. to bad you cant copyright a movie gesture...