FatalKitsune: I don't think they're talking about THAT kind of Triad. I think it's cults or something.
fuNGoo: Oh... Well, the twin pistols just made me think John Woo style shooter creating false expectations. A John Woo style mod using an oldschool shooter engine would be awesome though.
I think with the Doom engine you aren't gonna get much in the way of realistic environments.
The thing that made Duke3D so great was that it was the first game to really try and do real world environments. Before that the engines weren't really up to it...
Its basically Doom with different weapons and enemies... as all games were back then.
I'd assume it has a shareware version if you want to try it... most games did back then..
Try this page:
http://dfendreloaded.sourceforge.net/Download.html The first person games package has the shareware eps of Blake Stone, Duke, RoTT, etc..
(also the platform games package has demos of most of the apogee platformers like duke 1&2)