I'm also looking for an old game that I can't remember the name of and am not sure even actually exists. It's from the mid 90's I believe and I'm pretty sure I got the demo from a PC gamer demo Disc but then again the lack of info I'm finding on it leads me to believe that I'm crazy and it never existed in the first place.
Well, from what I can recall about this game, it was Like Hooligans and other RTS games that were coming out that decade, where you took control of a gang (Not Mafia Related Gang mind you, more like the Bloods and the Crips type gangs) and you were tasked with taking out the rival gangs in the city by extorting money from businesses, people, robbing people, and then using that money to go buy weapons and then in turn go and kill the other rival gangs. And, this is one of the key things I remember sticking out, you were the "Yellow" gang, so all your people wore various yellow clothes. I don't remember if you could pick you clothes color or not, I just remember the gang I was being yellow.......
I'm pretty sure it's from '93-'96 but again I'm not sure this game is even real any more. It's possible that it had a demo and then never was actually published... it's happened to games before.
EDIT: Oh, and it was from the US PCG